Here in AZ, the sun is brutal. I have had a few instances where the car's temperature has reached 116º, 117º, and 110ºF. I was surprised, since the air temp was only in the 70's and low 80's, and I had sunshades in the roof. So, now, I have to monitor the car every hour from 10 AM to 5PM. Because I work and live at the same place, I don't drive every day. I'm a teacher. So, when I do drive, I drive after 3. Also, I have no place to park in the shade.
The 12 hour temperature protection runs out in the early morning before sunrise and does me no good at all. I recommend that a 24 hour, all the time, option be available for when the car is plugged in.
I have a car cover that I use, but the temperature can reach 100º with an air temp of 86º. In a few weeks the air temp will be in the high 90's and low 100's.
I hope that Tesla will provide that option soon.