It will be interesting to see what true EV maintenance costs will be compared to ICE, as more EVs penetrate the market. Most of the mechanical stuff is gone, outside brakes and suspension and interior goodies. I wonder what the replacement cost for the electric drive motors is?
I doubt the motors will wear out, there's not much to go wrong in a brushless DC motor. I'd be more worried about the IGBTs in the power electronics, but those can be designed to be highly reliable if you know what you're doing and handle the thermal stresses well.