I think the killer of the current generation of cars will be the electronics. Not just the ignition and fuel controls - because those can and are hot rodded and substituted - its the all the little unique things - just like on our cars but worse. They'll be great until they break, then they'll be hunting for p/n xyz123 used on 1.5 model years. Even on my '85 wagoneer there's stuff that's become very hard to get - even something as basic as a PCV valve connection hose, or the air injection hoses, never mind the electric switches and stuff.