Modern equivalent

Popup thought.

For many decades, avant garde “art” was random messes with fancy titles. A picture of a few paint splashes was called “Evening soiree among thorns”. Radio and TV and movies made fun of this tendency, which eventually disappeared from painting.

Now the musical alt-subcultures are the audio equivalent. All of the noise is identical, a random mix of screeches and bangs and booms. Each subculture and band has its own fancy title, often reminiscent of the old pretentious “painting” titles.