I agree with all of this, but the assertion that some are making that the window demisting is weakly related to the climate control system seems very odd.
It's literally a function of the climate control system, and is almost always part of the same set of buttons as temp/fans etc in a car with hard buttons.
When you push the demist button, air is directed to the windscreen, by the same system that directs air to your face or feet.
This is a strange take on it, defogging is rather critical unless you have a rag handy, you have to see.
Wipers - rather critical. Engine - very critical. Seatbelts - rather critical of you value your life Fuel tank that holds fuel - very critical.
Auto hold is far from critical and I have only encountered it on large trucks back when I was a truck driver.