Cmd+, opens preferences in every app.
Cmd+[ or ] goes "back" and "forward", in every app that has those concepts
Cmd+Shift+[ or ] switches tabs, in every app that has tabs, except a handful of stupid chat apps who think they're too good for it.
Cmd+W always closes the current tab, if the app has tabs, (or current window, if the app has no tabs), and does not quit the app – that's what Cmd+Q is for.
Etc.
Also notice how PageUp / PageDn, keys that my keyboard doesn't even have, are not used for crucial shortcuts like these.
Seemingly small things, but absolutely maddening when developers don't respect the common convention, or when a common convention does not exist.
I always thought this consistency was a feature of the app ecosystem and app developer attitudes rather than the OS itself, so I'm not sure what RavynOS can do to make third party apps obey their idea of consistent shortcuts? The wiki doesn't mention anything about shortcuts despite the language on the home page.