This was also illustrated by Ubuntu by the way. When Ubuntu had the global menu ootb most of the Linux GUI apps supported it. A significant portion of the same

This was also illustrated by Ubuntu by the way. When Ubuntu had the global menu ootb most of the Linux GUI apps supported it. A significant portion of the same apps don't seem to support it in other distros/DEs even if I configure them (the DEs) to use the global menu. I tried Xubuntu, Manjaro KDE and ended up using classic in-window menu set-up because many apps used it anyway and I want the thing to be uniform (the situation when some apps use the global menu when many use their own seems ugly to me).