Every trade-off in quality will add weight and cost. There are very few exceptions. Possibly the simplest thing we don't do is run cars lean the way 90s civic smog boxes were, but it's because NOx is actually a pain in the ass for urban areas, which means every city becomes Chinese smog fest and every highway a smog factory. Cars just are not the way to build a society if you want durability, and I love cars. Maybe a situation where we use more trains and people drive their car onto the train in lieu of highway driving and get off at the hub destination.

RT: https://poa.st/objects/459a8be2-e244-4045-a3a6-5c03c766000d