- Nintendo Switch OS only runs on Nintendo Switch hardware -> Nintendo monopoly on Switch OS hardware
- Nintendo Switch hardware and OS only run officially licensed Nintendo game -> Nintendo monopoly on games for Nintendo Switch and OS games
- Nintendo Switch games only run on Nintendo Switch -> Nintendo monopoly on hardware that runs Switch games
(Apple and iPhone are in the same situation)
Compare to the situation with Windows:
- x86 hardware can run any OS, including Linux and Windows -> mostly no Microsoft monopoly, although Windows and Microsoft keys are often pre-installed
- Windows can run on any x86 hardware (and ARM I think?) -> no Microsoft monopoly, although they don't release source to port to other CPU architectures
- Windows can run any software from anyone at no charge -> mostly no Microsoft monopoly, although they can favor their own software
- Windows software can run on any OS, such as Windows or Linux with Wine -> mostly no Microsoft monopoly, although one can argue that having an OS API without an open-source implementation induces lock-in and creates a partial monopoly