Why don't cars come with the functionality to turn off the headlights after a certain amount of time when the key isn't in the ignition?  When would you ever want to leave the lights on?  Maybe you just need a light source, and your car happens to be nearby.  In that case, you likely have easy access to your keys, so you can put your key in the ignition and use the headlights.  But I can't think of a time when you'd need the use of your headlights without the use of your key.  For that reason, all cars should have headlights that turn off automatically after a certain amount of time.  It's dumbfounding that this isn't already the case. 

It's the same with blinkers. #travel