Point is still being missed a little here by a few folks.
- It is the hammering of the ABS causing the issue, as stated above
- The rotor pictured got to 1600-1700 degrees to exhibit some of the characteristics in the pics - hammering a hot rotor = worse
- This situation overstresses any type of rotor, but failure mode on a stock rotor will be different
- Getting 20-30 track days out of a rotor, PFC or not isn't by any means out of the question - you just can't pound it like the pictured rotor, no matter what it is