Addressing the post about two thirds of hybrid car owners NOT wanting to get another hybrid, Bill writes these cogent remarks:
It's hard to believe that, long term, a car with two drive systems is a better solution than a car with one. If you want efficiency, a diesel gives you almost the same mileage (about the same on the highway, a bit less around town) in a simpler package using technology that's been proven for decades. But US drivers "won't buy" diesels. Darned straight we won't, when nobody but VW will sell them to us. VW seems to have no trouble selling them, though. Funny thing, that.
The Chevy Volt makes more sense to me because it is an electric car with an onboard backup generator, rather than the Rube Goldberg solution of having an electric motor and IC engine in parallel, using both at the same time, switching in this and switching out that. The Volt's system is also more in line with what has proven to work in the real world. The one vehicle I can think of which used a combination IC and electric drive system for decades was the combat submarine. There too they started out with the IC and electric systems in parallel, but by the late 1920s they'd figured out that didn't work. Instead, they went over to the motors driving the props all the time, with the internal combustion engines only used to charge the batteries- the system the Volt uses. That worked best then and will probably still work best today. If you want to go hybrid at all, of course.