They have a pretty good track record in code hosting (15 years), why would they ruin it for containers?
applies very much to Github, and for all of their services, not just containers. The elephant in the room, hardly needs to be mentioned I would think (Microsoft). We are only a few years into that regime.
Free to existing Windows users, perhaps, but free to the world doesn’t seem like something Microsoft was historically in a position to offer, much less later kill.