98% of slotted and ESPECIALLY drilled rotors are junk and will crack. 99% of slotted and drilled rotors is appearance.
The purpose of both is not so much cooling but gas relief, which with what we are doing isnt a problem.
Ive actually gone THE OTHER WAY on a few vehicles that come from the factory with drilled rotors(C6 Z06 and C6 Grand Sport) and went to a solid rotor from Centric's high carbon line. The 6th gen ZL1 Camaro went to solid rotors from drilled in the 5th gen.