This has been my belief, too. We're now building them even less durable IMO. Single cylinders, two cylinders, tiny displacements, GDI.Final thought is one of the reasons I really became anti CAFE is because we are long past the point where actual improvements are being made that benefit the customer. What happens now is that the manufacturers arbitrage the rules to get to the standard, and wind up saddling the consumer with features that add almost nothing to the economy of the vehicle, but are often annoying (eg auto stop start) and can be very expensive to fix when they break or cause other problems ( eg Honda VCM, Hemi exhaust headers cracking due to temp imbalances when MDS activates).
All in the name of "efficiency" but is it efficient if it's disposable within a few years?
Where's the honest talk about "carbon footprint" (or pick metric buzzwords of choice) for going through three fuel efficient cars in the span that a single, more thirsty vehicle lasts? Of course, no one wants to have that conversation.
And I'm not saying there's a clear winner -- merely that longevity, disposal of dead vehicles and manufacturing of new vehicles must be included to get a real answer.