Re: "more of a super-cruise-control"
I don't know what kind of citation you're looking for with an idea that has been on the table for over a decade but hasn't yet been implemented explicitly.
As I pointed out, the main reason it hasn't been adopted explicitly is that the hit to emissions is enough to have had much the same effect. Manufacturers have been voluntarily phasing them out so there's no need for legislation.
I really don't understand what you're arguing with here. Are you suggesting new cars still mostly come with a spare? They don't, and there's plenty of consensus about why that is: the EU has strongly disincentivised them. This stuff comes up at the top of any google searches on the topic.
Biting the hand that feeds IT
