It really is a tragedy that git monoculture is winning over Mercurial, Fossil and other better designed alternatives. Don't even have a nice github-like service for Mercurial anymore as Bitbucket decided to give up.
This happened mostly because the benefits of those other tools over git are so marginal that they don't provide a strong motivation to pick them over git unless everything else is equal. With GitHub in the picture, everything else is not equal, and so...
I had been chronically depressed with Mercurial's decline, but now at least jj gives me hope for sanity: