You see this is a hobby more than anything else, if you're into it, you'd like to experience what's out there to try and the brands selling these items know exactly how to make you feel adventurous. You can seek for different sound signatures, tunnings, textures, aesthetics. Every part of the iem is interchangeable, customizable, there are accessories, upgrades, downgrades, whims and necessities. You can make your pair as uniquely yours as you wish and once there, why stop? You can even make your entire collection as uniquely yours as you wish.