Hi, I'm here. Been using Linux Desktop for years, not solely nor religiously, since I usually have more than one machines at a time. Work, personal, family and such.
Also, does it exactly matter? Hundred of thousands, millions probably, of devices run Windows and they're not desktop machines. Think info screens, ATMs, Kiosk devices, Industrial Machines and the list goes on.
I mean you asked. There is nothing special about me, I'm not a basement dweller, I have a job and a family, pay taxes and whatever. I'm not in the US if that matters. And I prefer to use other operating systems than windows or macos.