Model 3/Y/X are only 12V. Cybertruck is only 48V. Audi has cars with both 48V and 12V. You're not going to get the cost savings benefits of switching to 48

Model 3/Y/X are only 12V. Cybertruck is only 48V. Audi has cars with both 48V and 12V. You're not going to get the cost savings benefits of switching to 48V by having both 48V & 12V.