PHEVs are a type of EV and based on the mileage the owner probably used it as more of an EV with a range extender than as a hybrid. I think the point still stands that these cars are disposable if companies don't commit to long term battery support even if the technology changes. I can have a remanufactured ecotec on my doorstep in a few days if my 18 year old car's engine dies and I'm not sure it would be worth it to do an engine swap but if I did I could probably drive the car another 18 years.