CL makes huge sense for disc brakes in terms of heat management, and placing a very uniform clamping torque across the structure to give a straighter running rotor
I've spoken to Shimano techs about this before, when they would not make a 140mm 6-bolt rotor (for road bikes), only 140mm Centre-Lock, and I was a bit confused why so rang 'em up?
they said there was not enough mass in the 6-bolt interface for rotors under 160mm in terms of sustained heat management.
Others disagreed, this is why you saw a number of big brand road bikes coming with Tektro 6-bolt 140mm rotors despite otherwise full Shimano groupsets.
Whilst manufacturers who chose CL hubs got to buy the 140mm Freeza CL rotors from Shimano
Hayes used to make excellent rotors (not used their brakes for years now) and Shimano have been generally very good, other brands no so…