I don't really understand the appeal of jj as someone who uses sublime merge [0]. It has good support for submodules, a lot of the editing commits (messages, squash, move etc...) is really easy and I can also see and edit my stashes directly. Is there any benefit to jj compared to this?
committable conflicts give you painless rebases. if you know about rerere, try jj; if you don't, it might not be worth it.