The anti-AI crowd on Steam only really seems to care about it being used for art, from what I've seen in reviews.
Fortunately, I personally enjoy writing. Currently, I wouldn't be able to claim that Claude didn't contribute to the writing, but nothing in Vestiges should sound like genAI. (Which is actually a little funny to me since one of the characters is an AI. But the genAI writing style grates on many, including myself, and I'd imagine that 20+ years into the future, such issues will have been solved.)
(I've considered trying to find an artist to work with to have professional 2D art.)