I remember having to go backwards from SVN to CVS for a project a long time ago, and I was so shaken by the fact that CVS couldn’t do atomic commits with multiple files!
Yeah, my favorite model of how git operates is "rewind all the way back to RCS, add atomic commits and take it from there".
SVN, baz/bzr and friends are what you get if you add networking before atomic commits. Git is what you get if you start with the proper data model and only then add networking.
