I could never understand why anyone would use anything but CVS (if that works for them), or git. The VCS-du-jour craze just confuses me.
I could understand a lot why people would use subversion and not CVS. Not that I like subversion a lot (the trunk/branches/tags system seems a bit ad-hoc for example, though I must admit it works great), but the gcc CVS repository took 1 hour to tag, while it's constant time for subversion.
I could understand a little why people would use hg instead of git. I think that git's design is better, and most of the common objections are red herring (e.g. I never had any problem with "git diff -rHEAD vs. git diff" because, if my commit is complicated enough to add files, I always use "git citool" to review it instead), but it didn't work well on Windows until very recently, and there are no good tutorials IMNSHO. I even felt the need to write mine (see http://smalltalk.gnu.org/tags/git if you're intereste).
Paolo
