Similarly, under macOS in most apps ⌘⇧/ opens a full menubar search which can surface most app functionality from the keyboard. Not quite as good as a command palette but close, and devs don't need to do anything to opt in except populate the app's menus properly.

Well TIL. Great tip. I only ever hit that key combination when I look around Finder and find myself unable to go up one level easily from the icon bar - an action I do constantly.