>>3204981>insane level of technological developmentThe only thing insane about it was the massive government subsidies for turbojet airliners, which yeah, it would have been nice if people weren't such pussies about the Concorde and the very-attenuated sonic boom near NYC. But subsidies are the only possible way in which that mode of travel would have been accessible, or even a worthwhile development, at that time.
It's why they call it National Socialism.