Regenerative braking is deadly on CI (cast iron) brake rotors (corrosion from lack of use). What are Aptera rotors made of to address this?

I am on my 3rd set of rear rotors on my Sentra. Rather unique in that I drive to the airport, set the parking brake, and come back 1-2 weeks later. They call it Lot Rot. IF we need disk brakes (I hope we don’t), then please use Stainless Steel rotors. If we can do it all with regen then we avoid the constant rotor drag while driving, making it roll even easier.