Gianmatteo Costanza (@emissionite) header
Gianmatteo Costanza (@emissionite) profile picture

San Francisco based, civically-minded entrepreneur, thinker, techie. Believes in power of collaborations. 🏳️‍🌈

San Francisco, CA
Joined February 2014
Photo by Gianmatteo Costanza (@emissionite)Photo by Gianmatteo Costanza (@emissionite)Photo by Gianmatteo Costanza (@emissionite)Photo by Gianmatteo Costanza (@emissionite)Photo by Gianmatteo Costanza (@emissionite)Photo by Gianmatteo Costanza (@emissionite)Photo by Gianmatteo Costanza (@emissionite)Photo by Gianmatteo Costanza (@emissionite)Photo by Gianmatteo Costanza (@emissionite)
Ezra Klein explains it well, as usual: we have broken social mobility because we have gated who can afford to move to rich cities and climb up. NIMBYism has destroyed the American Dream. youtube.com/shorts/G91F-PTAM…
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Gianmatteo Costanza retweeted
Watching all the posts fly about Patrick Stewart, I have noticed something incredibly interesting that reaches deeper into the core of humanity: everyone, across the political spectrum, loved Picard. The original Picard, from the 1990s. It seems people from all walks of life feel a heartfelt loss, and I think there is more to it than just nostalgia or a celebrity passing. The TNG stories spoke true to everyone, no matter their politics. It was an era where we were able to agree on fundamental things, where our shared humanity and its complexities were spoken through timeless storytelling. It makes you wonder if that balance is why the 1990s feels like such a golden age in hindsight. I often see the argument that when the original Star Trek came out, traditionalists were offended by it, and that heavy-handed ideology and corporate pandering in the recent Star Trek series are the same thing. But I would ask: what about The Next Generation? It, too, asked deep, challenging societal questions about the human condition - yet everyone, left and right, loved it. I realize it was just a show, just a fictional character. But I think there is more to it. It represents something we are all sorely missing today: depth and a sense of shared humanity, delivered without constant virtue signaling, and without corporations trying to monetize every last ounce of our attention. Perhaps the true magic of Picard - and the era he represents - was that he challenged us to be better without ever making us feel talked down to. He invited us to reflect on our flaws rather than policing them. In losing Patrick Stewart, we aren't just mourning an icon; we are mourning the standard of grace, curiosity, and mutual respect he embodied so brilliantly - and which is becoming harder and harder to find. elov8.com/t/bb8c
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Shaka, when the walls fell.
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In lieu of flowers, memorial contributions may be made to: Johns Hopkins Alzheimer’s Disease Research Center Fund    alzresearch.org/giving/ Alzheimer’s Foundation of America Caregiver Resources     alzfdn.org/donate/ Photo Credit: Tommy Garcia
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$700/year property tax directly adjacent to $25k and $50k/year in San Francisco:
IFP @reedschwartzsf explains how 2 neighbors in San Francisco can own similar homes yet pay $200 vs $20,000 a year in property taxes under Prop 13: "I think it is very plausible you could find a home paying $200 a year and a home paying $20,000 a year right next to each other." "The way Prop 13 works is the value that the government assesses your house at is capped at the purchase price plus 1% per year, starting in 1975." "If you bought in 1975, we had enormous inflation after that, and land prices have gone way up. If you bought for $10,000 and you're paying 1% in property taxes, it's just significantly less than if you bought for $2 million. Very plausible in San Francisco today." @IFP
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Are you a District 10 eligible voter in San Francisco? (Potrero Hill, Dogpatch, Bayview, Visitacion Valley, Executive Park neighborhoods) Join us tomorrow, Monday, October 5, at 5:30 pm, for the District 10 Supervisors Forum. - The forum will take place at Providence Baptist Church, 1601 McKinnon Avenue before a live audience - The doors will be open at 5:30 p.m. - The forums will start at 6 p.m. sharp and end at 8 p.m. - The forums will be moderated by Marsha Maloof and Dexter Hall RSVP here - luma.com/jzg0np1o By registering, you get to submit questions that are going to be asked to the candidates. The district supervisor has an outsized impact on all things that affect our lives daily, so if you can, please join us.
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California is squandering its potential and driving our foundational industries out. We could write a glorious new chapter of prosperity instead. This is a choice. Choose wisely in November.
🚨 EXCLUSIVE: Paramount to leave California, according to the L.A. Mayor's office and the California Attorney General's office. What we know: tmz.com/2026/09/16/sources-s…
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I agree with Dario that we need to pace the frontier. This has been a primary topic of discussions we've had at OpenAI in recent weeks. Committing to having independent evaluators with employee-like access is a great idea, and we will do the same. We'll have more to share soon.
We Must Pace the Frontier: I’ve written a new essay on why the AI industry should slow down, with a three-part plan for doing so. Anthropic is unilaterally committing to the first of these steps. We’ll provide third-party evaluators with permanent, employee-level access to our systems, so that they can verify adherence to our safety measures, report on incidents, and assess models’ alignment during training. You can read the full post here: darioamodei.com/post/we-must…
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Good to see transit in SF finally recovering. But big percentage gains are easier when you’re starting from far behind, and SF’s pandemic recovery lags most other U.S. cities by years. Let’s be clear-eyed: ridership still hasn’t recovered to pre-pandemic levels.
July US transit data is in today, & all of the largest US rail networks are growing! Cali leads the way, with ridership up 15% on Muni, 14% on BART, & 10% on LA Metro SEPTA (Philly) & MBTA (Boston) also have strong growth at 8%, while MTS (San Diego, +1.4%) is the slowest🧵
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Sources: FTA National Transit Database, APTA reports, plus agency data (MTA, BART, WMATA, MTS, SEPTA, SFMTA, LA Metro, CTA/NITA). Heavy + light rail only, no commuter rail. Latest 2025–26 vs 2019. Approximate.
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San Francisco should have quadruple the subway it does and its coffers already overflow with tax revenue to build it, but due to institutional incompetence and corruption, I fear humans set foot on Mars before a subway station in the Richmond.
Manny is proposing a citywide subway system. mannyforsf.com/citywide-subw…
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And once again, the Sacramento status quo prevails over a common sense solution because too many of our elected leaders are more responsive to highly organized interests than California’s long-term needs. Thanks for fighting the good fight @BuffyWicks!
I am incredibly disappointed & frustrated that AB 1903, my bill to reform construction defect liability, just died in the Senate. Critical components were amended out Friday & it was ultimately held by the Senate late last night — missing the midnight deadline for concurrence.
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Californians could soon see some relief from their sky-high electric bills. The reason? Data centers. Thanks to data centers, PG&E has been able to offer rate cuts for the fourth time in two years. Let's keep building!
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My soundbar crashes AirPlay on volume change. Reported 2021. Never fixed. I could patch it tonight if allowed. But @Apple's code is NDA'd, @Samsung's flash is signed. AI could fix it overnight instead of waiting on updates that never come. eu.community.samsung.com/t5/…
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SF DEMOCRATS REJECT BILLIONAIRE TAX “The San Francisco Democratic Party broke with the statewide party Wednesday, voting overwhelmingly to oppose a proposed tax on California billionaires — the latest sign of how the measure has divided Democrats across the state. Of the 22 members present, 17 voted to oppose Proposition 40, a one-time tax of 5% on California’s billionaires.” sfstandard.com/2026/08/26/sf… via @omarsrashad @sfstandard ht @NancyTungSF @SFDemocrats
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By closing Market Street to cars but not buses, San Francisco demonstrated the fundamental failing of American urbanism: thinking of urban areas as places to go THROUGH rather than as places to go TO. noahpinion.blog/p/the-death-…
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Replying to @mattyglesias
It's because building anything at all is illegal. We have multiple canal systems built nearly a century ago that leak or can't run anywhere near capacity, because fixing them would (normatively) take two guys and a bulldozer but (descriptively) consume 10 years and billions of dollars of payoffs to a 100-turtle-deep layer of the usual suspects. We could easily desalinate another 10 million acre feet of water per year, but ... building anything at all is illegal.
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Activists were able to block an apartment project in San Francisco's Mission District by raising an increasingly ridiculous set of objections. reason.com/2026/08/18/san-fr…
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Claude has become a language, so I built a translator. English <-> Claudish
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Guys:
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This is great news: Construction has started to demolish the infamous Historic Laundromat and replace it with 75 homes. 2918mission.com/
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