I'm legitimately not sure what you're saying. Are you saying Linux, Windows, or MacOS? Because as far as Bt and Wifi go, usability, rewarding developers, that applies to Linux and MacOS and ... not Windows whatsoever. I'm not sure about High DPI support, probably sucks on X11, maybe on Wayland, so I'm guessing you mean Windows?

FYI I develop software for Linux in my free time, I don't get paid and I feel pretty rewarded.