Several jj developers (especially Martin and Yuya) are former mercurial developers. jj borrowed quite a few things from mercurial. So, jj can be thought at le

Several jj developers (especially Martin and Yuya) are former mercurial developers. jj borrowed quite a few things from mercurial. So, jj can be thought at least partially as a spiritual successor. Meta's Sapling is in a similar position. From this perspective, the key feature of both is transparent git repo and git remote support (hg can speak git as a foreign language, but it's limited)