I may have heard the universals, but if I did it was briefly. My rational for not doing it is essentially the point you already raised - do you really want to drop $1100 on custom IEMs and have them be your only headphone. Me, I could never live with only IEMs since I can't afford to be that isolated when I listen and when I do want to wear IEMs it is in situations when I don't want $1100 stuck in my ears (mowing the lawn, clearing the driveway, etc). So while I definitely get why some folks here dew eet, I don't agree that JH13s are the end all be all for everyone.