Well what's the point of using unix then, if it's not to make unix-friendly app not compatible ? To attract linux nerds ? > XWindows and OpenGL are not part of

Well what's the point of using unix then, if it's not to make unix-friendly app not compatible ? To attract linux nerds ? > XWindows and OpenGL are not part of POSIX. I don't really care about POSIX, I care about being able to recompile apps for a new OS, without having to rewrite core parts or change the design. I guess people would start to make new apps for the sake of apple. And by the way, what's the point of Cocoa compared to other existing things ? Is GUI programming that much important, now that everybody is using html and js ? Is it worth changing the wheels for the sake of a language paradigm ? At the kernel level, I don't see why there's a need for cocoa.