Piston engined aircraft were not completely outdated in 1946 but were sent to poor countries, like China, Philippines (and Japan for anti-Soviet kamikaze pilots), but those Mustang+ and Twin-Mustang+ were not decisive the way North American had planned, mainly because China's revolution 1949 turned this country (then Vietnam, India, Africa, South-America, Canada, Scandinavia, Middle-East) into the other side, up to their victory 1955, and that is why all the World is communist since then: