Car bumpers.
Design brief: Minimal size,strong, scuff resistant, easily and cheaply replaced if damaged parts of the car which protect the expensive bits and your no claims bonus from low speed impacts and ‘exploratory’ parking.
Execution: Massive,eggshell thin, colour coded body panels taking up most of the front and back of the vehicle, 10mm off the road, brimming with easily damaged expensive electronics which cost more than the nearest body panel to replace if they can be and require an engine drop and tailgate removal to do so….
Mate reversed his BMW EV into a low bollard at about 5mph – Nearly £5k
See also Wing Mirrors