Well I still think it's something to worry about before you end in front of a "Your account has been suspended" notice. How can you be sure someone has the whole dataset locally backed up ? Plus, you still have to reconfigure the workflows and stuff like that. Not to mention that sometime, project's websites are also hosted on github, so that's something else you have to rebuild.

And also, this means devs/contributors have to give their data to MS.

Since the whole point of the project is sovereignty, it should have started with setting up their own gitea/gitlab/etc. instances and domains.