I suppose you could argue when it started being a major driver of progress, but it's actually been around for 3.5 decades! https://en.wikipedia.org/wiki/Haskel

I suppose you could argue when it started being a major driver of progress, but it's actually been around for 3.5 decades! https://en.wikipedia.org/wiki/Haskell#Haskell_1.0_to_1.4 https://en.wikipedia.org/wiki/Haskell#Haskell_1.0_to_1.4