Formula One is already using capacitive braking. Only problem is the car cannot be touched for .5-4 hr after it comes in to the pit or else the first person to touch it is electrocuted.
Look up “bonding wire” in connection with static electricity generated by an operating helicopter. This allows electrical discharge at a poorly conducting landing pad before cargo and especially fuel transfers occur. Riggers use discharge poles to safety a flying aircraft from the rotor Corona charge.