I can’t remember if it was an American or a German that said it, but it was about either planes or tanks “We shoot one down, they replace it with 10.”
And I recall photos of their fancy airplanes being “taxied” out to the runways with mules. Fuel was in such short supply.
The American industrial base won the war for the Allies IMO. Too bad it’s all gone now and it’s probably going to bite us in the ass someday.