According to the guy who wrote JJ, he copied all the ideas you mentioned from hg. That included a lot of ideas from hg's add ons. So the similarities are no acc

According to the guy who wrote JJ, he copied all the ideas you mentioned from hg. That included a lot of ideas from hg's add ons. So the similarities are no accident. But then he added a twist - he didn't just delete the index, he dropped "hg commit" as well. I can't see it going anywhere. It is in many ways "just" a different porcelain for git. The plumbing is the same. It's also safer to use: no JJ command can lose data another JJ command can't recover.