There's a much more interesting idea that I'm waiting for somebody to do, which is just have AI break down a PR into digestible chunks for me. Stacked PRs are a nice idea but they require the developer to follow the pattern. I'd rather be able to get a big 50+ file PR, and have it be broken down into bite size areas I can review and check along as I go.

This would be especially helpful for mobile, where reading a traditional diff is basically impossible.