Reduced fading is to be expected, reduced costs and weight can be found as well in reduced size brake components, and probably a higher component life for calipers.

The trade-offs: brake bite, which is one of driver’s first concern with brakes. The kinetic recovery is higher with a higher speed difference, and therefore will be more interesting when the wheel has more inertia, just when the driver need to feel the bite, and the wheel do not need to get blocked. Therefore, a new set of pad/discs specs will be needed and that adds to development costs. But the question arises: Will both systems working together have consistency and repeatability? It is going to be interesting to see how they solve this problem.

I wonder why no one has considered air to store the energy. The advantage is that air is lightweight. Moreover, you don’t have to carry it when you don’t need it (unlike hydraulics). Air is highly compressible, and therefore store the energy transforming it in pressure. Air is available all around the car and it is free. It will very likely affect the aero, but the engine is already a big air pump.

Ideally, you will load your car with air when braking, which is good for braking performance. Then you will unload it when accelerating, which again, is good for performance.

Regards