supplier guaranteeing all the hardware is supported
This is really harder said than done. Its implications are often quite deep and misunderstood.The simplest example I can give is razer backlit keyboards and mice, which gamers seem to love. Razer's software makes them truly shine and that software just isn't available on linux. Open source alternatives exist and they do the job, just not as well as official software does. I do hope windows gaming refugees wont be swayed back when they discover not all hardware will "just work", or at least work just as well as on windows. With Bazzite being a "gamer" distro, I wonder if they made any strides here, though I highly doubt it, else we'd see it propagate to other distros.
In my own experience, I was sad to see no software support from canon, which meant I couldn't transfer files from my camera to my PC via wifi. Its a small price to pay, but it needs to be payed non the less.
In the world of digital infrastructure? Azure would be one big one. In this image, it would probably be a stone next to, or above AWS. Windows server and IIS, though that's not that important in the grand scheme of things (or is becoming less so each passing year). MS-SQL is still a thing. .NET and its frameworks are a bit more important and lower down on this graph, luckily they're also open source now. Having a stone as separate floating by itself is a little disingenuous if not ignorant, but we can forgive OP, since it is Microsoft :)