[rcarmo]

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.

[marginalia_nu]

Why would recently created accounts be 10x more likely to be created by owners of Apple products or English majors than the baseline?

[jmalicki]

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.

[nerevarthelame]

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).

Ellipses were never part of the analysis.

[nottorp]

Firefox Mac - did this get autocorrected to an em dash ... ?

Looks like no. It's probably Safari that "knows better".