I wanted to steer the boring same ol' same ol' in a deeper direction.
These "problems" have been solved so long ago, the penetration to market is the subrosa Juggernaut.
My apologies - you're essentially right on every fact you stated, and I definitely blew it when it came to the wording of my post.
As you suggested, we could have hi-mpg automobiles anytime we want them - but apparently there are other 'priorities' involved.
And while were at it kill the boutique fuel blends, all we need is winter and summer...
Most folks don't know it, but (speaking from memory) the 'blend' required by the Exalted State of Kalifornia costs ~10% more than your 'garden-variety' unleaded, and then delivers ~10% fewer miles per gallon (because it has ~10% fewer BTUs per gallon). Double whammy! That does not help anyone (except 'environmental masochists')...