My mom and dad run Ubuntu too, without even knowing it is not Windows. It was an easy transition since they never had the chance to fully adopt any OS out there

My mom and dad run Ubuntu too, without even knowing it is not Windows. It was an easy transition since they never had the chance to fully adopt any OS out there. Hence, they are able to manage all of them, when they are shown how to launch the browser. I'm using a Macbook, there is another Windows notebook at home. All feel the same to them, they say. They believe the UI differences are due to my or my sister's choice of theme.