The 152's not a prototype, it was the 190 that should've been made earlier. On top of that add German late war circumstances - of course late war models are low volume. Its production numbers are circumstantially, not purposely, comparable to the P-61's. The 152 is not... the XF5U or any Luft 46 concept. It's not even an arguably borderline model like, say, the He 219.