Pretty much my thoughts also - JH13 already has a lot of drivers, twice as much to go wrong as a 3 driver IEM, 3 times a dual driver. With 12 drivers, how would you even know if something went wrong? I had the same thoughts re carbon fibre - difficult material to work with just increases the chance that something is going to go wrong with the fit - probably take longer to make - and really nobody's going to see the inside of your CIEM when being worn, and when not being worn don't nobody want to see your wax covered customs. Bass boost - again another chance to introduce coloration or distortion into the system, and then to redesign the connector just of the bass boost circuit... Typically when I see bass boost on anything, or when bass is the main marketing point, this is what tells me the product is not for me. But yeah, I', sure that for some people it could be a delightfully excessive thing to consume/desire, and just maybe there will be some sort of performance gain from more drivers, but personally I'm really not hyped.