I dunno man ... IMHO, hydraulic disc brakes are substantially more complex than rim brakes.

Maybe that's part of my problem. One of the things I love about bikes is that the embody the KISS philosophy. They are minimalist, elegant devices that are gloriously (and deceptively) simple ... and marvelously efficient because of it. For me to buy into the disc brakes (or electronic shifting, for that matter), they would have to offer a significant improvement for the kind of riding I do. At this point, they simply don't. At least not yet.