Why Another DVCS?

Veracity looks interesting; I had not heard of it before. I have a question about one of the items on the comparison chart here:

http://veracity-scm.com/

What is an "immutability doctrine", and what does it mean for one to be liberal/conservative?

Edit: I found a FAQ on this question:

http://veracity-scm.com/qa/questions/71/what-is-veracitys-do...

Edit 2: I just noticed that the Veracity command is a nice, short "vv". Must be an homage to the emacs "ctrl-x v v" binding. Nice touch!

Git seems to have moved beyond just the early adaptors: http://blogs.msdn.com/b/codeplex/archive/2011/07/11/survey-r...

I'm really not seeing any answers here. I see that the project has decided it doesn't need (or hasn't yet implemented) some things that I think are fairly important.

I'm missing the simple list of "this is very important and missing from all the tools you know." Somewhere between git, mercurial, bzr and fossil, there's a hole so large and so fundamental that an entire new tool must be developed to fill it.

This page doesn't answer the posed question. It's actually something about SCM advocacy and adoption curves. The chart on the front page is much more informative.