Originally Posted by MichaelW

Disk brakes are not so advantageous to pro riders but are very useful for the rest of us and that should be OK. Anyone commuting all-weather on a road bike should consider disk brakes; they stop the same as rims in the dry and the same as dry rims in the wet.
A lot of disk roadbikes are starting to use chainstay position, which frees up the rack and mudguard mounts, then omit these mounts. The cable routing of disk brakes is not optimised for chainstay mounting, exiting at the wrong angle. If manufacturers changed the direction of rotation and exit from the bottom of the roller, the cable run would be more effective.