Slotted and drilled rotors got a bad name when first introduced as an option for daily driver. People had them cracking right left and center. I myself had an early set of PowerStop rotors crack on me that was 17 years ago. I’ve run 4 sets since that time that have given me zero problems and that offered superior braking. I believe the industry has adjusted, better friction material in the pads and better metal or carbon fiber available in the rotors. I don’t see the complaints on these with todays products. I’d like to see stats on heat dissipation between the two from the comment referenced above. You know, empirical data that shows the same rotor under both circumstances. I simply do not believe that a rotor that is drilled to align with the rotor vanes would cool more slowly and not run cooler than a non drilled rotor. It’s very hard to argue that the pads gasses do not dissipate more quickly with a hole or slot their to void them.
Anyway there is much to read on this subject and good arguments made on both sides of the equation. I’m not defending my slotted and drilled brakes, heck, I’m not even running them. Now do I believe that a $35 drilled and slotted rotor is going to hold up, probably not. You get what you pay for.