Comment by jwcooper
Microsoft is going the opposite of what you're suggesting. Their games are coming to Steam, Playstation and Switch. Also, their game division isn't exactly thriving right now. They have a ton of studios, but they are not selling hardware very well right now.
The more that time goes on, and the more entrenched steamOS/Proton becomes, they will not have any sort of easy time trying to lock-in to Windows. Even now in the earliest days of steamOS, there is blow-back when a game does not support the Steam Deck (which means Proton).
Playstation and Switch, for sure.
Steam, not on detriment of Windows, how can they allow something like SteamOS to put Windows to shame, with their own APIs?
I can bet on them changing that, lets see who's got deeper pockets.