[someeguy]

Think bigger:

* You have backlinks that point to your github repos, that need to be updated (not all of them are under your control).

* If you were foolish enough to also host your blog/project website/whatever on Github Pages, moving means starting somewhere else from scratch (again: you need to update all your backlinks, not all of them under your control).

* You have to update your build servers when your repos move elsewhere.

* Your issue tracker is stuck on Github

* Your discussions are stuck on Github

* Your (developer) social network is stuck on Github.

* Your statistics tracker is stuck on Github.

There are a lot of lock-in features hidden in plain sight.