Not sure what to call it for this thought I had, so I will just refer to skateboarding as a "sport" here so I can compare it to examples of traditional sports.
As a sport gets older and more established, and things become standardized, do the people doing it tend to have more uniform styles? Like you look at footage of old basketball players, baseball players, boxers, and other sports, and some of the early stars had pretty idiosyncratic styles. But as these sports have become more standardized, you rarely see players with a really unique style. It's like everyone gets trained to have similar movements and ways of playing, and also people have a tendency to mimic how others do things.
I wonder if the same thing is happening in skateboarding. Are skaters' styles becoming less diverse? You don't see as many skaters with really individual styles as much as you did in the early days of transition and then street.