Well, I don't think the VCS matters as much as the community does. And even if hg were clearly better (and git still does have some virtues, so it's not all th

Well, I don't think the VCS matters as much as the community does. And even if hg were clearly better (and git still does have some virtues, so it's not all that cut and dried), then running an open-source project that's not easily open to git users may be worse than missing a VCS with some cool features. And then there's network effects - it's popular, so it gets built into things like ruby's bundler and now even visual studio. Hg may be nice, but that's an uphill battle, especially over something that's perhaps not even all that important (i.e. even using SVN isn't a development death-knell or anything).