I own a car with +315.000km from 1995 (not my main car, however) that works as good as the day it was bought.

I would like to see battery degradation beat that. (yeah, the tech is new. We'll probably get there... In 10 years)...

About the materials... There is a few reports on their problems... Mining and other problems of getting it

About the battery cost: that's not what I've been reading! It seems batteries are the most expansive part...