> I'm in tech and I don't even know what "hardware designed for gnu"

Honestly, I knew I was in a tech bubble but not that much. I mean, if you want your hardware to work with Windows/Linux/MacOS, you just buy it with the OS preinstalled. If you install something unsupported, non-working devices is your problem, not problem of the OS or hardware.

Just like MacOS will probably not work on a Windows laptop, Linux will not necessarily work on a Windows laptop.