Your description of what GitHub is is simplistic and reductionary. These sites are not simply about git repositories, but providing features _around_ git, e.g.

Your description of what GitHub is is simplistic and reductionary. These sites are not simply about git repositories, but providing features _around_ git, e.g. CI/CD, issue tracking, wikis, project management, user permissions, contribution insights, etc. Those don't really migrate "in 5 minutes".