> But if you get banned from Github, can't you just pick different remote and keep rolling?

If you have a local copy. I imagine that if you have 1800+ repositories on Github, there'd be at least a few you probably didn't have installed anymore, because you knew you could always get them back from Github.

PRs are useful, and so is the discussion system. These things are at par with other platforms that are pretty much equally barrier-free.

Any of the workflow automation stuff might be more difficult to replace, but I haven't had an especially good experience with it anyway. I don't know about everyone else, but it's been pretty unreliable and fragile. Even the Azure integration, which ought to be first-class, is pretty opaque. I really wanted to lean into that stuff, but for now, I'm happy running my own.

If this happens randomly to a small-medium size foss project that doesn't have strong attention from GitHub the corporation it could be catastrophic.

Issue/discussion portability is much harder than code/history portability, I think is a deeper issue.