Not all applications need to be a classic "windowed application". I know this is a rare use case, but the DE and the app need to work togheter to allow global

Not all applications need to be a classic "windowed application". I know this is a rare use case, but the DE and the app need to work togheter to allow global shortcuts. I for example have a keyboard with many useless media keys , that I configured to run some specific scripts and some I could very easy set them up as Global shortcuts for some KDE apps. Not sure if other DEs would offer to setup global shortcuts for you. Probably something most users will use is screen recordings and screen readers , this applications need to have global shortcuts(and access to the screen and window elements)