I think the bigger question is that even if Microsoft is headed in a more trustworthy direction now, there's no knowing if they'll stay that course in a decade

I think the bigger question is that even if Microsoft is headed in a more trustworthy direction now, there's no knowing if they'll stay that course in a decade when there's a new CEO. Things shift. I can definitely see why this would be a desirable acquisition on GitHub's side. They were bleeding money. I can't blame them.