Not sure where you’re getting your information.
There is a huge market for classic cars. Ever heard of Concours? Most of that crowd like to keep them stock, but there are tons of sub-genres like drift kids and Stance nation to name a few weird ones. Hotrodding is alive and well.
There are car shows in most major us cities featuring hundreds of tricked out, restored and modified cars.
The classic car market regularly appreciates. Just try to find an Alpha for a good price, or graph the price of a 1970 911 over the past 30 years. Also you can insure a classic for cheap since they see less road time, are garaged and generally well cared for. (see Hagerty)
As for getting hotrods and restored classics on the road. California has half a dozen classic car rallies where roadworthy classics get out on the road for a couple days.
I assure you the culture is alive and well.