The passenger-mile invariance would be offset by the selection of different design tradeoffs. For example, most driver cars have far more performance "on tap" than will be used in the entire lifetime of the car.
Such performance is not free. It causes engineering tradeoffs that increase maintenance costs, complexity and of course reduced fuel efficiency.
But it's easier to sell a driver car with some oomph than not.
There will be other design tradeoffs you and I have not thought of (and could not think of) that will add up to further efficiencies.
Such performance is not free. It causes engineering tradeoffs that increase maintenance costs, complexity and of course reduced fuel efficiency.
But it's easier to sell a driver car with some oomph than not.
There will be other design tradeoffs you and I have not thought of (and could not think of) that will add up to further efficiencies.