I think at this point Apple does not see macOS (from the user perspective) like a traditional GUI OS. It used to be that OSes provided window management, file

I think at this point Apple does not see macOS (from the user perspective) like a traditional GUI OS. It used to be that OSes provided window management, file management, some basic file handling, and APIs and framework to build and connect apps. Apple, instead, sees the OS as an app launcher that provides a framework to build isolated apps. IOW, it's reduced macOS to the Dock.