By all means, #movingtogitlab-dot-com does not solve the problem GitHub has (centralization), and moving to a privately hosted GitLab re-introduces the problem GitHub mostly solved (separation).

#GitPub is trying to solve this problem by defining a federation protocol for git services: https://github.com/git-federation/gitpub

@jomo it does solve it in a way. You can always move easily to your private instance. Except if they suddenly turn evil and remove the export function.