You ably demonstrate your own inability to listen.
Or was it you?
I’m not sure how you hallucinated that Wayland got 4 years of design and 8 years of implementation.
2012-2021, or to clarify “Late 2012 to early-mid 2021” seems to be 8-point-something years to me. I dunno, did mathematics change recently or something?
With graphics programming relatively in its infancy X11 didn’t require 15 years to become usable
I hope you do understand that graphics weren’t as complicated back then. Compositing of windows was not an idea (at least, not a widely spread one) in the 90s. Nor was sandboxing an idea back then. Or multidisplay (we hacked it onto X11 later through XRandR). Or HDR nowadays. Or HiDPI. Or touch input and gestures. We software rendered everything too, so DRI and friends weren’t thought of.
In a way… you are actually insulting the kernel developers.