In the
case of a manual transmission car, so long as the engine is still
actually turning, so will the power steering pump.

And manual transmission cars are what, 10% of the US fleet?

I actually knew a pilot of a single engine airplane (a much-modifed
Swift) who had never made a power-off landing in his airplane, and
wasn't even sure it could be done. He was literally banking on the
engine (a Continental IO-360). It didn't help that he had (legally -
it is a long-standing field approval) covered up the slots in the wings
for speed, so the plane offered very little stall warning.

His engine crapped out on him while he was taking a relative for a
ride. He was about 50 ft above a rice field when he inadvertently
stalled the airplane and pancaked in. Killed himself and his
passenger.

Michael