If, in your street driving, you make 10 successive stops from 100 mph, all within 30 seconds of each other, you need better heat handling. Stock brakes usually stock as well as big brakes for the first stop, and gradually give up after that. By the tenth successive stop, they are overheated and the stopping distances have increased substantially increased.
I am doing a mild upgrade of the stock brakes, with Ferodo Super Formula fluid, Stoptech Street pads, EAS steel braided lines, and Hard Brakes titanium backing plates.
A couple of years ago, the a-workx m3 won a tuner shoot out test on the track with stock brakes but braided lines, SRF fluid and Pagid RS19 front pads. However, a-workx acknowledges that for serious track use, you want better calipers and better rotors.