(I'm a former Hybrid Electrical Vehicle Power Management Technical Consultant for a large defense contractor)
Maybe putting in a larger generator that could handle real time charging at 70mph would increase costs...
That's exactly the point -- the way that GM represented the Volt originally, I thought wow this is a bargain, a $40,000 purely electric driven car (e.g. a Tesla with a generator). But now, we learn that it's the same architecture as a Prius, but way more expensive.
NASA got awesome mileage out of this vehicle... considerably more than was initially expected- over 7700 meters!
DAMN! Watch out Ford, you've got competition!
(Haha joking, joking, don't kill me)
"The urge to destroy is also a creative urge." -- Bakunin [ed. note - I would say: The urge to destroy may sometimes be a creative urge.]