> would assume (hope) that code review practices haven't changed inside of Microsoft or Google.

Google engineer perspective:

I'm actually thinking code reviews are one of the lowest hanging fruits for AI here. We have AI reviewers now in addition to the required human reviews, but it can do anything from be overly defensive at times to finding out variables are inconsistently named (helpful) to sometimes finding a pretty big footgun that might have otherwise been missed.

Even if it's not better than a huamn reviwer, the faster turnaround time for some small % of potential bugs is a big productivity boost.