>>64227142
It was because of what the post (You) replied to stated: rapid advances in aeronautics overall and jet technology.
The years 1946-1960 were the golden years of discovery in 20th century aeronautics along with transistor electronics, guidance systems, rocketry. Those 15 years will never be surpassed, in terms of the breadth of new ideas, engineering progress, designs, and research advancements. Also was spurred on by the Cold War and (tangentially) nuclear technology.