Linux

Theoretically, when it's up and running. How do you intend to get to that state, though? One has to install it first. And I think that alone is a massive filter.

inb4 someone says:

I did it, and I found it extremely straightforward.

I'm sure you did, Mr. "I hate how much Reddit is pandering to the braindead to the point that I joined an experimental social media platform", I'm sure you did. Clearly, you are a qualitative sample of people who use Windows computers.

Sarcasm aside, look at how railroaded and coddling the Windows 10 installer is. I am certain a large plurality of Windows users' initiative would completely evaporate having to navigate that. And now we want to throw a Linux installation at them?

Factor on top how the vast majority of computer users in all forms that computers take simply take for granted that the OS the computer comes with is a part of the computer. Normal people don't upgrade OSes unless the OS itself railroads them into it (which Win10 already does aggressively whenable), or they buy a new PC that happens to come with it pre-installed. The knowledge required to negotiate an OS wipe and reinstall is not something most people possess, and I expect presenting that knowledge to them on a silver platter is something they'd hastily recoil from.

We're in a catch-22 here. Even if all the pieces for the fabled Linux Desktop are arguably here, actually getting it into the hands of those who would benefit from it most remains prohibitive.

This is also ignoring the elephant in the room: A massive swath of these Windows PCs (Maybe even most of them? I have no backing figures, just a hunch.) are not personal computers, but office PCs that belong to a company fleet. There's a reason Windows utterly dominates the office--Windows rules the IT sphere, at least where personal devices given to employees are concerned. Active Directory? Group Policy? Come on, guys. None of the companies who depend on these management tools are pivoting to Linux anytime soon, and you know it. And if their cheap, bulk order desk PCs don't support Windows 11, they are absolutely getting landfilled.

The only effective mitigation I could think of would be to start a charity that takes obselesced office PCs, refurbishes them to Linux, and provides them at low or no cost to those who need a low cost or free PC. It would get Linux into more hands, but it would also strengthen a stigma that Linux is nothing more than the poor man's OS. The Dr Thunder to Window's Mountain Dew.