There are those of us who have learned git and still prefer Mercurial. It's really annoying that git is supposed to be what we use across all programs, distributions, operating systems and hardware. Just about ASCII or TCP/IP are the only things that are about as universal, and git shouldn't be nowhere nearly as foundational as them. There should be room for more than one way to do source control.

Sadly, mercurial-buildpackage in Debian is a dead-end. :-(