X or Linux frameworks

Any sufficiently complicated X or Linux framework contains an ad-hoc, informally-specified, bug-ridden, slow implementation of half of Win32.

Linux's optimal use case is non-graphical headless servers.

X11 could actually have been made usable by deprecating the insane authentication system, changing the indirect GLX protocol to actually work and extending it to support something akin to OpenGL display lists or display PostScript. Instead, so-called “modern” graphics frameworks render everything client-side and treat X11 as a blitter and all the bloat persists.