Not that many Americans are car enthusiasts. The most popular cars have been basic commuters for decades.
(I śaw recently that the USA market is about 16M cars.. this would have been low figure years ago. But they are barely selling 'basic commuter cars'.)
A lot of Americans spend far more on their vehicle than they need to and so I would classify them as enthusiasts even if they couldn't tell you how many cylinders their engine has.
https://www.caranddriver.com/news/g64457986/bestselling-cars...