Both valid observations: Mustangs nice; Z06, no back seat.

From my experience with S197 Mustangs, it seems to me either the V6 or
the V8 is much more car than anyone really needs, overweight problem
notwithstanding. In either of them there is almost never occasion to
legally enjoy their capabilities. For those who find the opportunity,
cost of useful modifications is the least significant aspect of the
process. The Ford Factory Racers pare off a bit of avoirdupois and put
the money in the good stuff. Out of my financial league, but still a
neat package and a good value to those whose needs they fill.

I did extensive bolt-in suspension modifications on my V6 convertible,
added excellent wheels and tires, and came up with an on-ramp
masterpiece. Worked good on the autocross track, too. A real pleasure
to drive, but there it sits. Occasional autocross, occasional ramp
joy, occasional trip to the supermarket, occasional pleasure cruise.
Very few moments of full-use, and quite an investment just sitting
there. Seems as if the process of modifying it was as important and as
pleasurable as the ressult of all the money and the work. That may
have been true of the Parnelli Jones turbocharged project. Keep busy,
feelgood process and project.

Couple months ago I thought I was ready for a Shelby GT500, and
shopped a few. Test drives were delightful, I really enjoyed the cars.
Even at bargain basement prices, well under sticker, not for me. I
correctly anticipated the potential outcome of a GT500 purchase: same
deal as the modded V6. Nice car, lots of MPH capability, 'pedigree',
a pleasure to behold, all dressed up and no place to go. It would take
serious investment in time and money to use it at its limits more than
'occasionally'. I don't have the resources for that. I know of a few
who do, and I see the lengths they go to in trying to enjoy their cars
at that end of the envelope. Costly.

I settled for a GT/CS, recognizing its benefits and its limits, and
the limits it places on my impulse to modify it. Kind of a governor on
my behavior.

The differences between the V6 and the GT are not as important as the
similarities: either of them is a loaded gun on the highway, capable
of getting me - a decent and mature driver - into trouble with little
effort. Either the young folks with S197s have more sense than I give
them credit for, or someone is covering up a boatload of dangerous
behavior and accidents.

What is your point?  One can rent a MB, RR etc from rental car companies is
some markets, but they certainly not dumped on them and not the norm.