I still call voodoo on this. I use an iPhone, iPad, Mac to comment here—all of them autocorrect to em dashes at one point or another. Same goes for ellipsis.
I doubt it explains any reasonable fraction of this, but github moving from early adopter techies to general population "normies" would be a reason for the shift. I would expect it explains at least some increase in the use of em-dashes.
You can remove em dashes from the analysis and the trend is still there: newly created accounts are still 6X more likely to use the remaining LLM indicators (arrows and bullets, p = 0.00027).
I’ve built my own flavor (https://github.com/rcarmo/piclaw) and use it to batch convert documentation, check some news (it runs Playwright and sends me summaries of specific sites that don’t have RSS feeds) and do moderate tweaks to my website (like re-tagging posts and adding reference links).
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