Pretty cool that Linus Torvalds invented a completely distributed version control system and 20 years later we all use it to store our code in a single place.
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...