Too late. They already have backdoors installed in the ‘doze OS going back to NT 3.5 at least. Or so I have been told by people in the know.
Me, I’ll continue to use Linux and if the newest offerings from Intel won’t play nice, I am hopeful that other Mfg companies such as AMD will make some attractive options available.
I agree with most of your post, but in case you are not familiar with pretty much the coolest essay in the history of Linux/Unix:
http://www.ece.cmu.edu/~ganger/712.fall02/papers/p761-thompson.pdf