When driving with a passenger, and you stop and let the passenger out – have the vents turn off for the vacated seats. (For cars with electronic vents).
It’s cool that the vents do not start in the passenger seat and the back seat if no one seats there, but what about turning it off automatically when a passenger leaves?
I drive my daughter to the kindergarten a mile away from home, and then drive 40 miles to work. The air conditioner starts when she enters the car and then keeps running for the remaining unnecessary 97% of the time.