[whizzter]

Not to mention that the complexity of X11 shots through the roof once shared buffers comes into play.

X11 was ok for it's time, but fundamentally it's an really outdated design to solve 80s/90s issues over the network in the way you solved it back then.

[UltraSane]

It is INCREDIBLY outdated and forces all graphics to flow through a crappy 80s era network protocol even when there is no network. It is the recurrent laryngeal nerve of graphics technology.