Tires are the only point of contact between a vehicle and the road. Every input — braking, steering, acceleration — is transmitted through four contact patches, each approximately the size of a human hand. The condition of those patches determines the vehicle’s actual capability regardless of what the chassis, the brakes, or the electronics are capable of achieving. A car with excellent brakes and worn tires will stop in a longer distance than a car with mediocre brakes and excellent tires. Physics does not allow the alternative.