I don't have a direct dog in this fight...the only time I've ever formally used Github is for the new web page we're doing for the kung fu school. Even then, that's only because my compatriot is a Professional Developer, so that's what he's used to.
So in the short-term I don't care. Long-term, I'm sure MS will find a way to fuck it up through sheer arrogance (Exhibit A). If I were to do a for-real software project for myself, GitLab is absoulely where I'd be doing it. Still, it's hard to be super worked up about this, given all the alternatives that are already out there.