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Even on X11 almost nothing sends server-side rendering command anymore. Almost every recent application (save for suckless stuff) renders cliends side, which means that if the x server is forwarded over the network every frame is a bitmap download. It's an extremely inefficient way of doing things and it should have improved upon but wayland choice to just discard this use case was, imo, extremely narrowminded.

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That's not as true a you may think. While Gtk+ and browsers do render everything locally using OpenGL and what not, Qt has these days a way to fallback to just sending simple rendering commands over the wire, and most other toolkits do use render commands too. Admittedly for a lot of desktop users "browser" covers 100% of what they do with the desktop, but for many professional/industrial users does not.

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