I'm puzzled by the claims here that disk brakes require no more maintenance than rim brakes because it's so inconsistent with my own personal experience. I have half-a-dozen road bikes that I use for most of my road miles. One has road BB7's and the other five have rim brakes. Over the last 10 years I've ridden about a quarter of my miles (~15/60k) on my bike with disk brakes. I do all my own maintenance and have spent more time and money on the single set of disk brakes than the other five sets of rim brakes combined. I'd be curious to know how much maintenance revenue the typical LBS does on disk brakes now vs rim brakes 10 years ago, both in inflation adjusted dollars and as a % of shop revenue. I'd be shocked if it's even close.