Surely if you can blow off a tyre on a rim brake you can boil a hydro system/overheat a rotor? For heavy riders in the mountains there doesn't seem to be any brake that is immune to overload.
Not entirely. Horses for courses obviously, but many variables come into play. 200mm rotor and DOT fluid using brakes have a pretty high boiling point.
Looking at a bottle of DOT 4 now and it has a dry boiling point of 269c.
Surely if you can blow off a tyre on a rim brake you can boil a hydro system/overheat a rotor? For heavy riders in the mountains there doesn't seem to be any brake that is immune to overload.