I moved most of my stuff over to Gitlab a while ago since they seem to be actively innovating, but in general I don't quite understand all the drama. Github will continue to be what it is for a while and I don't think modern Microsoft is going to try and destroy it. There may be a few companies that feel the need to move off for competition reasons or whatever but I think most of it still comes from "Microsoft is evil". As much as I still don't care about Microsoft, they are doing some pretty cool stuff lately and I think this just continues their push to be relevant in the development space again. I know a lot of developers that now use VSCode as their main editor and the ones that have recent laptops with the Linux kernel are quite happy again.
And Git is supposed to be a distributed version control, so having a centralized place that everyone goes to is silly in a way anyways. But that's another conversation.