This suggests a related question. There's no inherent reason why programs other than your desktop shell and the current focused window (for window based DEs) ne

This suggests a related question. There's no inherent reason why programs other than your desktop shell and the current focused window (for window based DEs) need to have access to keyboard input. In practice, how good are existing DEs at controlling this access? I know, for example, that the slow move from X to Wayland has removed some of the methods a program might use to access inputs or the clipboard.