
ALT The image displays a chart titled "Posts with 2+ em dashes (%)", containing data for Reddit text posts containing more than 30 words and plotting the three month trailing average rate of posts containing more than one Unicode em dash. The data is plotted between January 2018 and August 2026 and contains a vertical bar in late 2022 marking the release of ChatGPT. The plot line of the graph begins just under 0.5% and, until mid-2024, grows very slowly - to a max of about 0.6% of self posts containing an em dash. From there, the rate skyrockets, hitting a peak of about 3.7% a year later in mid-2025. After the peak, the rate declines about 0.8% over time, ending in August 2026 at 2.9% - still a good five to six times as large as before LLMs began writing posts on Reddit.


























