Can you elaborate about the practical value of having the history of back and forth, in a PR or even in the commit log? In my 20ish years of experience, I can’t recall a single instance where I’ve solved something thanks to having this work-in-progress state persisted in the repo history.

It’s exclusively been the other way around where having a smaller number of larger squished commits (post merge) that’s made the project be more maintainable.

It's not about having it in the commit history. I've seen a few cases where the back and forth revealed that the AI reviewer was offering bad advice (and a few others where I suspect bad local AI advice is why people keep sending me the same category of mistake).