Slotted AND drilled rotors scream POSER.

There is simply NO real race application for both, one or the other will work. Holes will not last as long.

Plus when you combine the holes and slots you start decreasing the swept pad contact area. Fine when you can upsize a pad as you engineer the system, but if you have a fixed (stock) pad size you give up stopping power (and thermal mass)

Of course most people are clueless, so only people that know high performance brake rotors will know how silly holes plus slots really are, the rest will be impressed....