Replacing the battery might not be as important as you think. So far batteries seem good for 200k+ miles with 80% of their capacity remaining and the rest of the car is going to likely degrade by that point. Some vehicles like the leaf did get replacement services due to their popularity and the later upgrades to higher capacity but I am not sure how common this is going to be in practice given how many miles batteries are actually good for.
Replacing the battery might not be as important as you think. So far batteries seem good for 200k+ miles with 80% of their capacity remaining and the rest of the car is going to likely degrade by that point. Some vehicles like the leaf did get replacement services due to their popularity and the later upgrades to higher capacity but I am not sure how common this is going to be in practice given how many miles batteries are actually good for.