It seems I'm going to be contrarian here because I really prefer AI-supported (obviously reviewed for accuracy) PR comments over what I had seen before where I'd, often, need to reach out to someone to ask follow up questions on requirements, a link to a ticket, or any number of omissions.

I have worked at smaller firms, mostly, early stage (< 50 engineers), and folks are super busy. Having AI support in writing better thoughtful commentary, provide deeper context is a boon.

In the end, I'll have to say "it depends" -- you can't just throw slop at people but there's definitely a middle ground where everyone wins.