F-16 and Tornado first flight 40 Years ago
And one of them is still in Production!
While slightly less than 40 years before that (in 1934) there was the first flights of the Gloster Gladiator and Fairey Swordfish.
I guess it is fair to say the F-35 does not represent the same level of progress!
An even starker comparison is the time line between the Eurofighter Typhoon -1994, the English Electric Lightning - 1954 (40 years between the first flight of the respective prototypes) and the aircraft which were making their first flights 40 years before the P1, the Vickers Gunbus was one in 1914.
FB