A really good article about subcultures and how they evolve, and why they (often) get ruined as new people join: https://meaningness.com/geeks-mops-sociopaths
Some excerpts below:
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Before there is a subculture, there is a scene. A scene is a small group of creators who invent an exciting New Thing—a musical genre, a religious sect, a film animation technique, a political theory. Riffing off each other, they produce examples and variants, and share them for mutual enjoyment, generating positive energy.
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Mops also dilute the culture. The New Thing, although attractive, is more intense and weird and complicated than mops would prefer. Their favorite songs are the ones that are least the New Thing, and more like other, popular things. Some creators oblige with less radical, friendlier, simpler creations.
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The sociopaths quickly become best friends with selected creators. They dress just like the creators—only better. They talk just like the creators—only smoother. They may even do some creating—competently, if not creatively. Geeks may not be completely fooled, but they also are clueless about what the sociopaths are up to.