If relying on phone to open car & its your "cash" & credit card substitute I stand by my contention if phone is lost you are stuffed. If you lose the car key but have your wallet you can still get home to get your spare, your eggs are not all in one basket. How are you going to contact Tesla to unlock your car if you lost your phone, cannot use a payphone you have no money? McLaren offered a green key with a logo as a £1600 option I think on the Senna. You presumably got a perfectly good key if you did not take the option.
