Go open the hood of any car made in the last 10 years. The engine bay is crammed full of doodads needed to satisfy the regulators. I want to buy a new vehicle without all that stuff, but can't because regulations prevent it from being made.

look at all the new cars. if they arent fully hybrid/electric, then they are these small displacement 4 cylinder engines. The v8 has essentially died out, or is on its last leg. V6 are super rare and only for the top trim cars. (look at 3 series bmw for example.. all the way from base 3 series to m3 and what has changed over the years)

In europe its alot worse than the uS.

Each new car generation that comes out in the US is now losing horsepower as the manufactureres have to hit environmental regulations.