I have a cheap 2nd gen Nissan Leaf. It's one of the worst cars for battery degradation since it has no thermal management. I'm in a temperate climate so that helps. After 6 years it's now at about 84% state of health. Not great but it's not catastrophically bad like some anti-EV people will have you believe. I believe the first year experiences the steepest drop in health. Maybe after another 6 years it'll get to 70% and it'll probably get sold to a person who drives shorter distances.