My brother used to state this- and to be honest i did not believe him. The conclusion is- cars should run much longer to wear off there energy debt. A mindset is needed that runs directly contrary to the colour and form frenzy that is capitalism, which is unlikely to change. A compromise would be a car - consisting of a near everlasting baseframe, and a decoration shell, that can be exchanged as often as the heart desires for monetary value.

That and software could continu with constant change, while the hardware remains relatively stagnant.