This is why Valve invested so much in Linux. They saw the writing on the wall of Microsoft becoming Apple (but shittier). Now they have an alternative. If Microsoft charges a 30% tax on all Steam transactions and won't let Steam run unless they do that, Valve can heavily push Linux and Steam Machine sales.
> Microsoft becoming Apple (but shittier)
At least Microsoft haven't fallen so low as to fail basic design principles like having transparent on top of transparent buttons, having disappearing controls depending on window size (scrollbars), or having corners so rounded that the click to drag mostly being outside the actual window.
The Windows 11 UI is annoying, but at least it doesn't look like a kid's toy.
And yet they failed to get game devs to natively target SteamOS.
As long as they depend on Proton, they haven't fully solved their problem.