alt Hacker News> it adds very little on top of what I was already able to do by saying "this is PR 1 out of 7, this is PR2 out of 7 and build on top of the branch that I used for PR1/7, etc".
That's literally all it's supposed to do. Make that dev flow less awful so you don't have to say "by the way this PR depends on #123, I will change the target branch when that is merged" and nonsense like that.
Well, then it provides so little they could have not done anything at all as well. Useful stacked PRs would be something that uses AI to split my large branch/PR into smaller PRs for upstream to review. Claude does that for me.