The correct answer is to not drive so fast (or at all) in conditions where braking might lead to a skid. I'd expect an autonomous vehicle to be rather better at this given they can hook directly into the electronic stability control system in a vehicle and constantly monitor temperature (and ideally measure upcoming road temperature).

Also, shifting into neutral is really only a thing for old vehicles without ABS/ESC. In modern vehicles, you let your foot off the gas slowly.