dennis
Model S Plaid
Sure, all of those vehicles cost you $90k-$115k out the door. But is that a fair comparison? Setting aside the Karma (because it is something of a special case) the 5 year cost for fuel, maintenance and repairs for a BMW M5 are ~$36,000. Both the 2012 BMW 750i and 2012 Lexus LS600hLwill have a 5 year cost of ~$28,000. The majority of those costs are for gasoline, while the energy costs for your MSSP will be ~$2,000 for equivalent use (maintenance is harder to calculate because the vast majority of that cost will be from frequent tire replacement).
I'm prepared to stipulate that the interior of all of those vehicles is better than what you get with your MSSP. Are they $18,000-$25,000 better (or more, depending on the actual difference between maintenance costs)? $18-$25k is likely at the extreme low end of the premium you are paying for those vehicles, especially in the case of the M5. And that is completely aside from depreciation expenses.
While being firmly open to debate, I feel a strong argument can be made that your MSSP will depreciate much more gracefully than any BMW. The Lexus is extremely reliable in comparison to the BMW so I'll give it a partial pass, but even that is mitigated by a substantial yearly operational cost which works to cannibalize its value.
It would be interesting to know how many consumers base their purchase decision on 5 year cost of ownership vs. what they can afford to spend now (0.9% financing, $0 down, etc.).
I'll admit that as an avowed car nut since I was about age 7, my purchase decisions have been much more based on the emotional feeling the car generates, coupled with what I could currently afford, rather than an antiseptic analysis of 5 year cost of ownership, likely depreciation, et al. This is also true of the decision to buy the Model S (and the Karma, which has turned out to be 1/2 the cost per mile of the M5, even with $.20/kwh gouging from PG&E).
I'll also stipulate that I have gotten tons of enjoyment out of driving each of those cars, and would not have chosen a lower cost of ownership car unless it had the same emotional grab.