Yeah, 'cause the incredible fragmentation of Linux GUI toolkits and windowing systems is so fun to deal with. Year of Linux on the Desktop when.
Couple decades ago for me.
> Yeah, 'cause the incredible fragmentation of Linux GUI toolkits and windowing systems is so fun to deal with.
Sounds like probably "never" for you. You seem hostile toward Linux, so you're probably better off sticking with whatever you use currently.
With Linux, the main difference is whether your desktop is primarily Qt or GTK. Sometimes an app using the other toolkit will look kind of funny, but most of those differences are paved over by any competent distro (eg: Debian, Fedora, Ubuntu, OpenSUSE...).
GUI toolkits are irrelevant to games.