People have been building stacked PR workflows on top of GitHub for a while now. It's great to see that the message seems to have finally landed at GitHub, but what is actually new here in GitHub itself (i.e., not counting the gh CLI tool)?

There seems to be a native stack navigation widget on the PR page, which is certainly a welcome addition.

The most important question though is whether they finally fixed or are going to fix the issues that prevent submitting stacked PRs from forks. I don't see any indication about that on the linked page.