But an operating system isn't meant to be "interesting". It's an operating system. It should only be meant to operate the system. The interesting should be up to whatever programs it is that a user puts on top of it, something that makes it work better (like optimisations), or at most, make it look nicer. Recall is not that. Your car should be functional as a car. It doesn't need to be capable of baking souffles, or be a fully-functional mobile office suite. An OS should follow the same principles.