Nah although I agree that Linux is a huge sleeping giant, Microsoft systems in general still have a huge hold over quite a lot of things, and also does a good job of providing business as whole to a variety of sub groups, everyone that runs engineering software, antivirus software, hell, SQL databases, even the dating apps, and the creators of spywares, all these things work with Microsoft et al for money, if they had to switch over to using Linux, they would find the same ways they do today to make money, you would see huge increases in use of one common desktop and window manager package, spyware, hacking tools, targeting Qt, supply chain hacking and diversion, gitlab DDOSing, etc.

The reality is that all of these things are things that Microsoft and partners has already had to consider and deal with, so if Ubuntu or Arch were to step into the mainstream marketplace even with OEM support, they would have to face the same scrutiny and problems which someone would eventually expect to have to get paid for to resolve it help out with.