Insert the standard comment about how git doesn't even need a hub. The whole point of it is that it's distributed and doesn't need to be "hosted" anywhere. You can push or pull from any repo on anyone's machine. Shouldn't everyone just treat GitHub as an online backup? Zero reason it being down should block development.

The problem is that any kind of automatic code change process like CI, PRs, code review, deployments, etc etc are based on having a central git server. Even security may be based on SSO roles synced to GH allowing access to certain repos.

A self-hosted git server is trivial. Making sure everything built on top of that is able to fallback to that is not. Especially when GH has so many integrations out of the box