They've been around for almost 20 years now, and 2.5 generations (later millenials, Z, Alpha) have all spent formative years using smartphones. The subcultures

They've been around for almost 20 years now, and 2.5 generations (later millenials, Z, Alpha) have all spent formative years using smartphones. The subcultures have already formed, died out, and formed into new subcultures multiple times already.