As was stated already, it's still a decent show.
Yes, it's smaller, but still a pretty good amount of cars.

There are obviously more late model Challengers these days than there used to be.
As everyone gets older it's a lot easier to take a long trip like that in a newer Challenger than an old musclecar.

Personally I think that the judged show car count had dropped quite a bit.
It could be that crowd is worried about driving their cars and hurting the "investment value" by driving it or exposing it to the public.