When the battery dies does the owner just buy another car and also keep paying for the old car? or do they buy another battery for nearly the price of the car? Does the car work without the battery?
Either way the owner is out a lot of money when the battery dies.
In the US, plugin hybrid batteries have an 8 year or 100K mile warranty. If you don’t put a lot of miles on the car, the car should be paid off before the battery conks out..