No. That's exactly what I'm saying doesn't happen with a rewrite, ever. You think you take all of the knowledge with you, because after all, you wrote the thing

No. That's exactly what I'm saying doesn't happen with a rewrite, ever. You think you take all of the knowledge with you, because after all, you wrote the thing so you know how it works. But it just doesn't work that way. There is too much complexity to carry around in your head. I'm sure many lessons from Xorg were carried over to Wayland, but "all" is an insane exaggeration. And I'm sure many new mistakes were introduced. It's inevitable with any new system.