Microsoft doesn't own the pc... the pc is a modular, open ended platfrom one of which components microsoft has a stake on a stake that shall I remind you is non-essential thanks to wine and proton.
Nobody owns the pc platform... closed platform owners exercise their ownership by getting a cut of every piece of software purchased by the users. If anything the closest PC has to a classical console-like platform owner is Valve
This is kind of a lie tho. Microsoft
DO own Windows. Y'know, the most popular OS in PC for gaming by far? The OS itself has like some 75-80% market share in the PC space, but for gaming, that amount is probably closer to 90%+.
So I always find it odd when people say "I'll just go PC" when, really, that usually just means "I'll just go Windows". You can't use a PC without an OS, and if you're gaming, chances are very high you're using Windows. Valve are wanting to change that over time with Steam OS (which, incidentally, would help Linux adoption rates), but that could take a
LONG time if current trends are any indication.
I don't know why people aren't more honest about this. PC is "open" in theory, but it's not completely open. Theoretically it's an open platform, and as long as you use the world's most popular OS that is proprietary & owned by a $3 trillion mega-conglomerate and also closed-source (walled garden) in its own right...sure, you can do anything you want with as much software and programs as you want in that walled garden. Oh, you need to run some graphics to see what's on the screen? Sure would be nice if you could make or build your own GPU huh? Well you can't; you're stuck with either Nvidia, AMD, or Intel. All of a sudden that doesn't sound too different from the Sony/Microsoft/Nintendo paradigm we have in the console space, does it?
Even Steam fanboys sound stupid when they say things like "PC is an open platform"...yes it's "open" yet you primarily game through a closed-source, proprietary storefront wholly owned by a single corporate entity (Valve). Compared to what it used to be, I'd say most modern day "openness" on PC is an illusion and most users mistake the freedoms of features & customizations with it being a truly open platform, when in reality most of the platform is tightly controlled by a small, close networks of massive tech corporations, primarily Microsoft.
I didn't even get into stuff like how GPU features are commonly dictated by DirectX compatibility (that's one reason AMD quickly moved from RDNA1 to RDNA2, for example; they didn't have DX12U implementation of mesh shaders supported on RDNA1), which just further shows the extent of Microsoft's control & influence over this "open platform" called PC, but you get the point (hopefully). Ironically, it's all these reasons why I keep saying MS would be better off leveraging Windows for Xbox in a gaming sense, versus what they've been doing this gen, which has basically been a resounding failure for their consoles.