that's a lot of my point. The Prius prime (for example) has a 8.8kwh battery, which at $130 per kwh works out to $1150 of battery. That's not negligible, but the benefit is pretty massive. That's a big enough battery to get you 20-25 miles of pure electric range which means that if you have a short commute, you will dramatically cut your gas usage. Full BEV is great obviously, but IMO, you probably want 1 car to be gas optional still, and a PHEV gives you an easy path to be driving almost 100% electric with 0 compromises compared to a gas car.