I love me some functional programming, and spend most of days happily immersed in F#, but when I see Haskell programmers casually discussing the lengths they’ll

I love me some functional programming, and spend most of days happily immersed in F#, but when I see Haskell programmers casually discussing the lengths they’ll go to to avoid side-effects, I am always in awe. It’s like overhearing monks in the Middle Ages talking about their favorite techniques for copying the Bible by hand.