> A car sitting in a Texas parking lot in July will get to temperatures that the engineers probably didn't think possible.
AIUI, the car can run its cooling/AC system to keep itself cool, even when powered off. I'd imagine that this is actually a bigger concern for the battery's health and safety, not the chips. You're not supposed to let a battery get that hot.
If a cooling system needs to be built just to keep the car from dying when no one is using it, then I would argue we have jumped the complexity shark and need to go back to the drawing board. I can walk away from my vehicle without worrying about it turning back into a pumpkin. Most consumers are looking for an experience approximating this.
If you're talking about a gas engine, you're missing the complexities because they've been with us for a century.
If you don't change the oil regularly, the car breaks down. If you leave old gas in the tank for a year, the car won't start. If you don't change the filters, the car eventually breaks down. If you don't change the belt after its admittedly long life, the car breaks down.
You swap all that for the need to keep the car's battery somewhat full to maintain a constant temperature in the battery bay. You don't do that, the car does it on its own. Just plug the car to recharge the battery somewhat frequently, dependent on your weather.
A car in stop and go traffic in Texas at the same time will need even more cooling, the car needs to be kept comfortable for the humans as well as what the batteries need, plus because the car is moving it has extra heat from turning motors.
As the others have pointed out all the major manufactures know the problems here, and ensure there isn't a problem.
AIUI, the car can run its cooling/AC system to keep itself cool, even when powered off. I'd imagine that this is actually a bigger concern for the battery's health and safety, not the chips. You're not supposed to let a battery get that hot.