Two main points: 1. Development of X is slow. Like "the kernel supports switching between gpus flawlessly but X needs a restart"-slow. Users notice this (thoug

Two main points: 1. Development of X is slow. Like "the kernel supports switching between gpus flawlessly but X needs a restart"-slow. Users notice this (though I don't know the current situation of this issue). 2. X-window-managers have awful performance compared to Windows. Try dragging a window around in IceWM or every other Linux desktop. It looks like hell, flickering borders and such. Though I remember a interview with the developer who did the first push for a new scheduler before cfq as he quit kernel-development who tried to tune the kernel for this, so this hasn't to be X fault. Just found it, Con Kolivas and http://apcmag.com/interview_with_con_kolivas_part_1_computing_is_boring.htm http://apcmag.com/interview_with_con_kolivas_part_1_computin... Point is: The desktop of Linux is slow and maybe Wayland will help. 3. (It is always more) That it is a mess to develop for X (and it is) leads to bugs user will notice.