> No GitHub PR sync for stacks. Managing stacked diffs locally is great, but (a better version of) Sapling's PR syncing would be a huge value add. This is somewhat of a pain point for me directly, but even more so a weakness when I've tried to evangelize jj internally as a viable "stacked diff" solution (e.g. to be blessed by our eng tools team). Someone familiar and comfortable with Sapling (or just skeptical of jj) can easily point to this feature gap in a way that pretty much ends the conversation.

Can you explain this point in detail? I've been using jj and doing stacked PRs on GitLab using `jj git push --all`. I haven't used Sapling so I'm not familiar with it's way of doing stacked PR and I'm really just curious what do you miss from it.