Has legality or bad PR stopped Microsoft in the past? Worst case they pay a fine and everyone continues to use Windows anyways. The only reason Microsoft hasn’t done this already is because they haven’t figured out a way to profit from it yet.

Basically all of Valves business relies on Windows. Valve saw how Apple operates MacOS and iOS, then saw Microsoft release the Windows Store and put two and two together lol.

I think the whole point of Steam OS is to cut down reliance on Microsoft. If Microsoft really wanted to the could cut support to Steam all together.