Comment by gucci-on-fleek

They definitely have; lots of the recent bug reports [0] explicitly acknowledge AI assistance. You can also look at the list of pending bug reports [1] and see how many are from 2026 compared to other years (and it takes many months to get the bug reports enough to add them to this list, so this significantly undercounts things).

[0]: https://tug.org/pipermail/tex-k/

[1]: https://tug.org/texmfbug/newbug.html