Teen Gothic

The USA has been host to a great many subcultures, however, these subcultures are usually short-lived. The Greasers lasted around 10 years and the Hippies lasted around 15 years but the Goth subculture has, for some reason, persisted for over 40 years and counting re-inventing itself each decade but remaining largely consistent in its foundational principles. I'm wondering how exactly Goth has managed to exist for so long while all the other Subcultures had remarkably short lifespans?