I remember attending an OSCON session on git vs. Subversion back in 2006 or 2007. The presenter's thesis was basically that git was more efficient than subversion when it came to branching.

Near the end he walked through the distributed nature of git. That was the second of third OSCON I attended, and I have never seen, nor have I seen since, that many utterly confused developers in a single room.

At the time I thought it was just a poor presentation.

With the benefit of hindsight, I've realized the presentation was just fine. We, the developers, just had that much baggage from using CSV and Subversion. "What do you mean forking isn't evil!" "What do you mean you can branch like that?"

It feels like, at some point, there was a tipping point of younger developers who didn't have to unlearn subversion. Makes me wonder what other heresies we'll do a 180 degree turn on in the future...