IBM To Linux Desktop Developers: 'Stop Copying Windows' (InformationWeek)

The main thing about cars is they're mostly homogeneous. And for the non-superficial
differences (say, the type of transmission) people often prefer one way over the other for
often the same reason as other people prefer is the opposite way.

Don't forget that cars also aren't something that people jump into (the driver seat) without
any training (like most everyone has done with computers); I'm not sure about all countries,
but it's often illegal to drive a car without taking a test that generally covers the normal
interface for the car (as well as using the interface).

IMO, cars make a better example of a (mostly) homogeneous interface than being an intuitive
interface.