The White GT they have at Scottsdale Mall (not the one in the showroom) apparently just came in either this past weekend or early this week. I test drove it yesterday, and it has some additional security features designed for test driving (namely the need for the SA to follow a slightly different start-up process). Overall, it drove very well (though admittedly I don't have any other EV driving experience to compare it to). I had a little time to try it on the highway, and it didn't disappoint. Though I will say that it would be great to know, as others have said, what is operational and what is not when you take possession. For example, I asked if it would prevent me from changing lanes when another car was present. I guess that's part of the ADAS and not currently enabled.
In other words, I'm not so concerned that ADAS features aren't yet there, but as I'm not sure what everything related to ADAS may be - like Adaptive CC. I do worry that if I were having the car delivered soon, I might take some safety features for granted that aren't quite there yet. Obviously, that could lead to bad results.
But overall, nothing about the test drive swayed me from my original plan to purchase. Hopefully, with 2-4 months of wait time, a lot more will be enabled. Just tell me what's not there when I get it. That shouldn't be a big ask.