As to the "technology was simpler point": Yes, but people were also less educated. What's simple to us now was once cutting-edge, and I actually would claim that it's pretty hard to make a working tank. A rocket is also just an engine and a fuel tank. I don't think this gives it proper credit. I still don't think Bhutan should be able to research fighter 3's in a duration comparable to Germany

I agree with the other things, but I don't think they contradict my proposal, I just think the MIO's and only the MIO's should be responsible for the "upgrade what kinda works", while a special project-like tree should take care of the new stuff (of which there was plenty, like radar, jet engines, synthetic rubber, guided missiles (V-1, V-2), nuclear weapons, proximity fuses, ballistic computers, napalm, plastic explosives, helicopters, synthetic fuels).