Comment Re:Still on the doors? (Score 4, Informative) 185
Catalysts were added to address smog. Leaded gas poisons catalysts; that's why the lead was removed. Yes, society benefited tremendously by this, but we need to remember: unleaded gas was driven entirely by smog regulations.
As smog requirements got more stringent, fuel injection replaced carburetors because FI controlled the mixture more accurately, making the catalysts more effective. FI also slightly improved mileage.
I don't think there's any connection between fuel injection and cruise control; we had cruise with carburetors in the 1960s.
Of course, the rest of the benefits you mention are real. But none of this was done to benefit the consumer; it was mostly done to meet smog regulations.