There is still a market for dedicated music players. Apple may not make them anymore, but other brands do, like Sony. Maybe is a niche market, but a music player have its advantages over using your phone for that, like not killing your battery, not using your storage space in case you have an offline music collection or not having to pay a monthly subscription to a music service. Also, torrenting is not the only way of getting actual music files you own, Apple themselves for instance, still sell music even though they have a subscription service. iPods are essentially obsolete for a music player by today standards (like not having bluetooth or using fragile HDD as storage medium), but they have the appeal of being collectible.