How much do replacement engines cost for ICE cars? I bet you don't know that or think about it when getting an ICE car.

Engine replacement rates will probably be historically higher than battery replacement within standard car lifetimes. It's possibly that a battery car will last longer than an ICE due to less moving parts, but even then I think long-lived EV cars will be relegated to city car duties with reduced ranges.

Batteries usually degrade rather than catastrophically fail (exempting the dramatic but rare battery fire which I believe happen less than ICE fires).