[zeveb]

> I know, it’s strange… since 1972 everyone was thinking that we were manipulating versions, but, it turned out, surprisingly, that thinking about the changes themselves as first class solved a very important problem: the problem of merging branched code.

This is a very good point, and it really was revolutionary.

[trasz]

It was, but I'm not sure if it originated in DVCS: doesn't Perforce work the same way?