Just a quick, fast comment:
A big part of owning a Mustang is making it your own. Fail in that regard and you're just another hair dresser or mid-lifer in a stock Mustang failing.
So, why do I say, "Not Today!"?
Because there is ZERO aftermarket for this car which means that you and everyone else who buys one early will look just like everyone else who bought one early. Sure, there will be manufacturer options and maybe even a few dealership options but there won't be anything like the aftermarket currently available for S197's and back.
What do we say to the S550 Mustang?