[Groxx]

While I understand and somewhat empathize with this desire (I'd use it all the time for personal repos, for example)... current VCS systems are terrible at supporting it.

What you probably want in this case is something like "automatically commit on every change (possibly recording every keystroke)" + "automatically tag based on tests/builds passing or failing" + "allow manual comments at any time, whether based on files changing or not". All of that is technically possible with git/hg/fossil/etc, but it's so much work for both the recorder and the viewer that it's infeasible.