> I don't know how you could expect a delete not to be a delete unless you were familiar with something like git already.

Ability to control and be able to reverse any changes you make to the source code tree is an essential feature of version control system - precisely because you don't know in advance what will work and what won't. The fact that people are not used to that simple idea just shows how broken are most of the other tools out there.

There is no reason not to want an unlimited undo for almost everything, especially today when disk space is so cheap.