There’s a bit from Clarkson where he compares an old school aluminium-bodied Land Rover to the newfangled SUV things of the same brand. Used to be, switching to 4WD involved pulling a lever connected to a ferry-sized piece of metal going ka-chunk. Nowadays, you press a button and a red light comes on. How is that going to get you out of a ditch?
Consider that the (in electric cars, obviously next-)most power hungry item on cars back then was the wind shield wiper motor. Modern cars easily put out 100kW, but then spend most of that in a thousand little ways. Back then, a 20W engine would be plenty.