For me the killer feature of jj is how much easier it makes rebasing. With git, if I knew a coworker had recently merged changes to a file I’d been working on, I would really dread syncing because I knew there was a good chance I’d get stuck in rebase hell.

With jj, you still have to deal with conflicts, but you can do it on your own time, so I never fear syncing anymore. Also, on the rare occasion that I mess up a merge, I no longer have to pull out my git sorcerer hat to fix it. I just `jj undo` and it’s like it never happened.