>>59275Pretty much. Still weird how a concept (swept wing), after having been proposed by Busemann on a conference in Rome in 1935, in presence of e.g. von Karman and Eastman Jacobs, and then classified in 1936, could be such a massive revelation at the end of the war.
When american engineers got their hands on the data in 1945, many projects in development were halted and redesigned to include a swept wing. Only reason the X-1 had straight wings, was that it was almost finished by then. Which is why it took some seriously thin airfoil to pull it off, so thin that they had a thicker wing for regular testing, and just put the thin one on for supersonic flight.
But to get to the A380, more than just a swept wing is necessary. Two other major developments are supercritical airfoils and the area rule, coincidentally both thought up by Richard Whitcomb.
Now add high-bypass ration turbofans, modern materials and you're on your way.