I went to school for electro-mechanics, electric drive trains are much simpler. The electronics have a couple of details, but they are basically scaled up computer psu-s. Biggest problem for car manufacturers is probably designing a different car then the ones they made before. Bateries are the most expensive part and should degrade faster then the motors (decades), maybe even electronics (10 years, depends on design).

But yea cars have gotten too expensive in the last 15(?) years.