I am about to take delivery of Model S Plaid in January with FSD and considering trading in my M3 with FSD Beta (10.5). Does anyone have any idea if the Safety Score attaches to driver or car? In other words, when I trade in the M3, will I have to go through the Safety Score process all over again to get full FSD on the Model S. Does the new owner (if sell private party) retain the FSD full Beta or do they have to start all over wrt Safety Score. So far no reply from Tesla which is not too surprising.