Yes but the original author in this very thread has said that the data loss was through MQ(Mercurial patch Queue) delete. mercurial queues are an optionally controlled patch queue, so he had some code stashed it in an uncontrolled queue, deleted it and was surprised that it was really gone. This is rather analogous to what I posted for git. It was a bit of bad luck on his part but switching to git doesn't close that hole his code is still vulnerable to the same set of actions.

So his whole reason for switching is I shot myself in the foot. And instead of learning more about his weapon of choice to avoid doing that in the future, he traded in his gun for one that is slightly more complicated.