If you're not tracking it, those carbon ceramic rotors will likely last the life of the car. That fluid service and inspection is probably a grand or less at an independent McLaren shop, and even cheaper if you learn how to do it yourself. The reality is that IF something breaks it's going to be expensive, though.
It’s never taken me 30mins at a supercharger. It always takes me about 15min, sometimes 10-12mins. As for exhaust sounds, I got my V4 Panigale & 911 Carrera for that…ya just love hating.