Actually I do, isn't that how it is most frequently done? Fact is that even though it works and you can set it up yourself, it is not a good solution to decentralizing a code base. You might have a private machine to which everybody ssh'es and pushes and pulls from, but only a few do that because they don't want to be/have the ops people who run that box. And that is including but not limited to issues and a sane UI for collaborations. That's very well the problem that github/bitbucket/gitlab and the like solve.
So you are telling me that there is no problem and people should just use a private SSH connection to a box they own?
