I just want the simple feature of PRs updating when the target branch changes. For example, say I have two tickets: T-100 and T-101. Both are targeting main, but T-101 builds on top of T-100. I put up a PR for the T-100 branch against main, and put up a PR for the T-101 branch against main.

The T-101 PR can't really be reviewed yet, since you are looking at changes from both T-100 and T-101 (because T-101 was based on T-100).

Ideally, after T-100 is reviewed and merged, the T-101 PR would automatically update to show only the T-101 changes. But it doesn't. You have to manually rebase or merge main and push changes to the branch to get it to update. It would be great if GitHub handled this automatically.

Locked... I'm like 40% sure they'll mess this up in some way that makes it completely useless.