I'm with scriptacus, you lost me with your argument #2. People buy Mercedes, BMW, Audi, Jaguar for all kinds of reasons, nothing foolish about that.
Maserati and Austin Martin don't even belong in that list, they are iconic brands which by itself may be enough reason for someone to buy one. Personally, I like the Austin Martin styling even more so than the Model S. I could never afford to buy one, but it is a very beautiful car. Who cares that the Model S does 0.5 second better from 0-60, or that it cant fit 7 people. I doubt many would consider that argument.
There are rich people with whole collections of cars, some are for fun rides, some daily commuter, etc. I just met a Model S owner who has a Ferrari, a couple of BMWs and a Mercedes.
The silence of the S is golden. I like it better than any Mazerati or Austin Martin