We seem to have 3 categories. Perhaps Conslaw can give us some guidance in what he intended?
3. Planes that were ordered in large numbers, either before the fighting started or after that turned out to be not what was promised/desired once the realities of combat had sunk in. (Polite way of saying dud) and were shuffled off to secondary duties (or parked) as soon as possible.
Funny thing though, the BA.88 I listed would have been literally two weeks production for 1943 North America, but were a sizable quantity for Breda and Italy. Do we consider industrial capacity as well?