Looking at what's happening with RAM pricing and Crucial being shuttered, the doomer in me thinks they could just pull the same thing with every other PC component. It's not like some plucky band of upstarts can start 3D printing organic free-range FOSS processors, hard drives and motherboards in their garage- all of this shit comes out of a couple of giant plants in Asia. If porky strangles the supply, that's it. In the end all the average joe schmoe will be left with are cloud-based terminals that rely entirely on subscription services and that require strong identification to even use (and that will monitor and log every single fucking thing you do while drowning you in ads)
Wanna install Linux? Go ahead! What are you going to install it on though, your grandpa's old Pentium? 
Wanna ditch subscription services and sail the seas? Oops, it looks like hard drives cost 5,000 dollars and are only sold to enterprise customers. I guess you're not storing that media anywhere
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Why on Earth would they make Linux illegal? Linux is a kernel for servers, mobile devices, and embedded systems. A small number of lunatics thought it would be funny to run it on a personal computer, but those people create bug reports and PRs that help with the big corporate projects, so it all works out. 5% of people with a PC use Linux on it, and 13% of people don't have a PC at all. Besides, operating systems don't matter nearly as much as they used to (and will continue to matter less) as everything migrates to the web, where you can easily charge subscriptions to everyone for services.