Happened for my car community too, anecdotal of course.

Two aspects I think, the clout chasers move on, and the remaining cohort are older with a bit more empathy for community and also better things to do than provoke the cops. No speaking for everyone with that last bit, there are still those that thrive on the chaos.

There's also tech to solve for having your cake and eating it too. Get a valve, loud for track days, quiet for the commute.