Edit: I made a typo in wolfram alpha :]
They do kinda suck when driving slowly as they only really work well when hot but electric cars can just brake with the engines at those speeds to make up for it. Though they are used in combustion engine sports cars too so it is not that bad. Just need to warm them up like tires when driving hard on a race track.
For sports cars carbon ceramic brakes also have the massive advantage that they do not fade with heat like traditional brakes.
Not sure if the Rimac really needs anything otherwise as well. Plus, it has regen braking and a crazy cooling system to help there. Parents math was off about the amount of energy also.
My car has carbon ceramic brakes (GT3). Two reasons: don’t need to be warmed up for full stopping power and way less brake dust. That is the only advantages in practice. On the track warming the brakes up is easy.
That can't be right.
2300 kg * sqr(410000/3600) * 0.5 = 14893006.000 Joules
14893006J * 0.000277778 = 4136.9 watt hours
Edit: out of curiousity, in order to have a kinetic energy of 50GWh, it would need a speed of 1424260 km/h (884994 mph)
And 0.01% inefficiency in transfer would melt the car (and the road, and...)