Only truck brakes are designed to fail closed. Passenger vehicles aren't, even though they could be. In fact, there's a lot of safety systems that passenger car

Only truck brakes are designed to fail closed. Passenger vehicles aren't, even though they could be. In fact, there's a lot of safety systems that passenger cars don't have, for no discernible reason. There's no warning light for the brake fluid reservoir or pressure, even though it would be trivial to add. The oil warning light for passenger vehicles is so useless, when it comes on you have to stop your vehicle immediately. Gasoline gauges are designed to trick people into thinking they're on empty and then provide an extra gallon or two, even though they could actually design the gauge to display average miles based on the rated mileage of the car and size of the tank. Transmission, diff, brake, and engine oil fluids could be measured or at least timed for when they need to be replaced and a warning given to the user that it's time to maintain it. Only in modern [usually expensive] cars do you find tire air pressure sensors. Why don't we have these basic maintenance and safety systems built into cars? Too expensive? Too technically challenging? Nope - they want you to bring your car into the dealer regularly to regularly charge you for maintenance you may not need.