The program certainly achieved those things. The 10-15 year range (a large group getting new vehicle credits) is likely relevant in second hand ownership and u

The program certainly achieved those things. The 10-15 year range (a large group getting new vehicle credits) is likely relevant in second hand ownership and used car markets, so it is likely highly relevant. "Generally safer" is a detail to dig deeper into, do the cars have more safety features and are they better performing, no doubt. Has the US seen fewer pedestrian deaths, fewer collisions, no. Cost to repair also went up significantly. Possibly worth mentioning is the financing model changes of car manufacturers over the last 3 decades.