I was allowed to drive the car to work today after some negotiation. Janel's original position was that none of my coworkers were allowed to sit in it, but she did agree to allowing them to sit as long as they didn't have sharp things in their pockets and they clean off their feet. She is very protective of her very clean new car.
I also tried Autosteer. That's the self-steering part of the assist programs, and the one that allows people to make porn videos or watch Harry Potter or take a nap while the car deals with the mundane task of driving until it suddenly can't. It's clearly marked as being in beta when you turn it on, and on the slightly curvy two-lane road that approaches Flyin' Miata it did very much feel like beta. Here's the road:
The car was lane-keeping well enough, but wasn't slowing for the first 90 degree left so I took over. The lines are pretty much worn off the road there, so I gave it the benefit of the doubt and let it try again for the right. Same deal. I didn't have the nerve to see just how deep into the corner it was willing to go before it figured out there was a problem.
The twisty bit is down through a wash. The initial right is over a blind crest, then the long left descends down. The open right-left are climbing. The car reacted a bit late to the right over crest, it didn't take action until it could see the road surface but it did stay in the lane and didn't have to be too abrupt. The downhill left had it shedding speed and maintaining a reasonable lateral g. So I'd give it a passing grade on that - the first corner was probably smoother than my sister would have done it and the second turn was basically perfect.
But still, the car felt like it was sniffing around. It might be more competent on the interstate but it's very much an assist program. A Model 3 owning friend of mine who is a car enthusiast (track days, serial Miatas, etc) says he finds it takes just enough of the mental load on trips that he is free to concentrate on other things instead of lane-keeping. If you approach it that way, I can see the value - the same way that setting the cruise control to the speed limit allows you to stop scanning for speed traps. You get to free up that part of your attention for other things...but those other things should still be driving-related.
The Autopilot (adaptive cruise only, remember, not the Autosteer) is good in traffic. Keeps a reasonable gap and will come to a full stop at a traffic light if the car in front also stops. It'll accelerate normally back up to speed once the car in front moves, too. Haven't had the opportunity to find out what happens if it's first in line :) If you have to deal with heavy traffic every day, I can see this becoming your new favorite toy. Lucky for me, I don't.
I did discover that, unlike the 2019 Miata, this thing doesn't read street signs. At least, it won't display the speed limit on a sign but instead depends on its programming. The Miata will override or supplement the programming with what it reads, so it knows about construction and about the speed limit on my little tiny road.