So much this. All the pipeline and delivery stuff is glued into github’s API. Most companies aren’t using git any more but github and git is just a dependency. I’ve even seen developers who are unaware that git can exist without github.

I incidentally think this is a completely terrible outcome.

It doesn't really mater what service provider you use. You can't do anything that requires a sync if the server is down. You can do a bit of local development, but things like automated tests and deployment to staging servers will tend to break if they can't access the source.

Or badly configured CI, that redownloads dependencies all the time instead of caching them locally.