They may have used ChatGPT or similar to help with the prose but the technical content (as discussed elsewhere on this page) is good, so does it really matter if they did?

The problem with AI slop (to me) is more that the technical content is not good or is entirely the product of the LLM. At that point, there's no point in me reading it, I can just prompt the question if I'm interested.

This is original research which wasn't public before, so the value is still there and I didn't think whichever combination of a human and LLM that generated it did a bad job.