Haskell

Haskell was always intended to be useful for real applications. In the preamble of the Haskell 1.0 report, it had those same words. So I think we're very lucky to have sort of caught some kind of wave. It does engender sort of tensions around the rate at which the language evolves and what we do about breaking changes. But on the whole, I see that this is a sort of creative tension. Some things are just if your shoe is rubbing, that's not a creative tension, it just hurts. This is a type of tension from which good things can grow if we pay attention to each other in a respectful way.