I did discover another aspect of disc brakes. Especially with a steel fork. Under hard braking, the fork legs flex quite a bit. Like a quarter inch. It was kind of freaky at first. It does make sense. With rim brakes, the braking force is all supported by the fork crown and there’s a long lever between the hub and the applied braking force. With discs, however, there’s a very sort lever and the rotating mass of the wheel applies a lot of deflection to the fork legs. I don’t think its a problem, but it is interesting.