[gknoy]

I'm sure part of it is familiarity, but also a difference in documentation. Git's documentation makes it EXPLICITLY clear that one thing Git is intended to be awesome at is easy branching and merging, and rebasing. When I worked on a Mercurial codebase, we pretty much didn't do feature branches (or the hg equivalent), and therefore "rewrite history" was considered not just heresy, but likely to Break Everything.

It's not that it's impossible, but that it was not clearly described how to do it right, in contrast to the Git documentation. Now that I've been using Git for nearly three years, and have used it to save my bacon, I'm sure I could find some way to do similar with Mercurial ... but only after having learned it with git.