Yep, I've played with it. Things might've changed but I couldn't get KDE's global menubar to work at all under Wayland, and under X11 a lot of apps don't populate it.
I have the widget for global menu right now in KDE Wayland. Its supported by all QT apps, and there's a wayland protocol pull request for it (unfortunaly stalled, as is tradition). Overall I like it a lot - enough of the apps I use support it (if you're a GTK fan then tough luck).
Thanks for sharing. Would you happen to know if Electron apps might surface the same menus they do under macOS via this protocol? Between Qt and Electron a lot of stuff would be covered.
