I'm in the process of moving mine to self host, I'll put a guide with the steps I'm following so others can follow them. It's really good that git basically provides the thing out of the box. This is ok for most of my use cases which are private repos, or shared with small groups of friends. For public projects, I think we still need a way for projects to be easily found, like a directory. Sadly GitHub filled that space, it was ubiquitous. Not even gitlab or bitbucket approached the massive adoption github has. Even some fediverse version of it would probably have a hard time being that massive.