Only 12k miles out of a PS4S? That seems very low. Are you basing this on somewhat often burn outs and digs?
315/35/20 PS4S saw 20k miles on the PS4S before it starts to loose rain efficiently. Dry traction still good until 25k but I took the camber out of the rear end so they wear evenly.
I got 6k miles out of my NT555rII this summer and they have about half tread left still. Did very well I’m the rain for a drag tire. Never took it over 70mph during heavy rain though. I definitely fall into the race things on the street category. Full summer of bing challenged at lights, highway runs and trying to beat my brother in laws trackhawk from a dig lol