I realize the disc brakes, rotors, and hubs will add unwanted weight but road disc brakes will not heat up the rims undermining the glue holding the tires on.
I firmly beleive this was part of the problem in the crash. The already hot temps combined with braking heat.
Perhaps the pros would scoff their use anyway as purists and due to the weight factor.
I was just so disappointed Joseba crashed when he was doing such a good job attacking Lance. Maybe he will be in similar shape or better next year.