I still mourn the passing of Bazaar (Canonical's CVS, developed in tandem with Git but abandoned some years back). It was a lot easier to learn and use than Git

I still mourn the passing of Bazaar (Canonical's CVS, developed in tandem with Git but abandoned some years back). It was a lot easier to learn and use than Git and had a beautifully clean Python codebase. Unfortunately, it was also slower than Git and not as powerful, and eventually just lost out in the survival of the fittest... Though having said that, it's still alive in the Ubuntu universe, and there's a community effort underway to keep up maintenance and port it to Python3, under the new name of Breezy.