America havn’t production problems, that’s true. But all war factories in America was (and now too) private property. In difference of Britain (JSC with goverment in the main holder) or Soviet Union (full goverment property). That means, the price of planes was more high in America, and war production need more money. The problems was, but not technological or with lack of resources. Problems was economical.
More, I think the Russian plane “U-2” was a great plane (not best, of course) That was a simply wood plane named “night bomber”. This plane was making in the interior factories. But that plane was really “head-ill” of German. The wood body is bad from many points, but have a some great - explosive ammo, when shot such plane go through it and don’t explode. And the bullets easy go throw body without any damage. Only weak point - engine and pilot. But enemy must be sniper to shot such small target. Soviet has many excellent plans in ww2, but only for U-2 after war was made sculptures, and we have many songs about it…
About Jet planes. Only German using jet planes in ww2. But Russia and America made a good prototypes at the end of war. Soviet “Mig” series was ideal fighter to drop down alltypes of American planes in Korea…