Offer a downhill assist control for descending in icy conditions. Some automakers call it Hill Decent Control (HDC).
In slippery/snowy conditions downhill assist control can stabilize a car when descending a steep slope. The all-wheel-drive option helps going uphill, but no additional improvement when descending! That’s why there are some roads in the alps that are closed in winter for cars without all-wheel-drive when going up – but for descending all cars are required to use snow chains.
Especially the heavier weight of cars like a Model S is a major disadvantage in conditions like steep slippery (downhill) slopes.
Moderator: Some Toyota SUVs offer Download Assist Control, but we didn’t see any other manufacturer offering it. This may mean it’s protected with patents.
Tesla has advanced stability and traction control system, which works significantly better than ICE cars and is likely in the same league as ICE downhill assist systems.
(voting combined from a close duplicate that has been removed)