> Not impossible, it just needs to be implemented at a different layer. The compositor needs to expose some API for global hotkeys.

That's a big problem. When things become an optional extension for a compositor, that means you cannot reliably deploy something that depends on it to Wayland.

At this moment, things in the wild are coupling themselves to libwayland-client and in practice ossifying its ABI as a standard no matter what the wayland orgs say about it.