It costs them nothing. Sideloading on iOS is already a thing, they spend more restricting the hell out of it than just letting you do it

Yeah. The behavior i stated was how it works in Gnome. In KDE since Xorg passthrough is a formal thing, the behavior is different based on those options

Xorg global shortcuts will work for anything using Xwayland, but not in anything thats wayland native

For example, in a game (using wine, which uses Xorg by default currently) your global shortcut will work. But in a wayland native window like Firefox, it will not if its the active window