I figured that if I poked around long enough I'd find something. Mostly I searched for "Linux won't boot after Windows 10 boot", and just found descriptions of how you need to install Windows first. But once I got the idea of ditching Windows in my head, I really liked it. It just seems so much more... peaceful. No more fighting for privacy, no more updates I can't roll back, no more of Windows casually deleting my boot loader... And no annual fee either.
Plus, I think it's the right time. It just feels like Microsoft is slowly wrestling control of the machine away from me, a little bit at a time. And while it's just starting to get a little stifling now, I can only imagine it getting worse. UEFI is currently only a hair away from not letting you install other OS's anyways. You can't tell me Microsoft isn't thinking about it. Because they've got to be thinking about it.
It seems that Windows is slowly turning into a console. I mean, why would they want you to install software not in the Windows store? They could act as gatekeepers to your computer, like they tried with RT. In RT it was too soon... but when the whole world uses Windows 10, and modern software won't even run on Windows 8 anymore, what are you going to do? If you want your precious software, you'll do it on Microsoft's terms. You'd have no choice but to use the Windows store. And Microsoft will take a cut on every sale, and gets the final say on which software you can and cannot run.
Depending on where you stand, this might seem to have a small chance of happening, instead of the big chance that I see. But with Linux there's no chance. Heh, that could be their new slogan: "Linux: Not a Chance".