Are you saying that it was a mistake for Mercurial to make their software easy to use? That's a strange thought!
Mercurial didn't lose because it was too easy to use. It lost because it was too slow and because GitHub became too popular. Those are orthogonal issues.
Mercurial didn't lose because it was too easy to use. It lost because it was too slow and because GitHub became too popular. Those are orthogonal issues.