I moved back to git from fossil SCM, after previously migrating the other way.
I use git for work and so couldn't forget how to use git and go all-in on fossil, and remembering two sets of commands proved somewhat painful and I wasn't seeing the benefit of built-in issue tracking or anything like that. Now I run gitea git server instead.
Weirdly I don't have too much trouble remembering two programming languages, but I think that's slightly different somehow.