You do want to draw a strict line. When I say most programmers don’t get it… I’m talking about you. You don’t get why carmack is bullish about pure fp. You thin

You do want to draw a strict line. When I say most programmers don’t get it… I’m talking about you. You don’t get why carmack is bullish about pure fp. You think it’s just map, reduce and filter and you don’t get why those functions are irrelevant. To you you’re just fulfilling an ocd need to simplify your code and make it more pretty. There is deeper insight here that you missed and even when you read what carmack wrote about pure fp I doubt you’ll internalize the point. Lisp is not pure. That’s why you don’t have the insight. For the true insight you need to learn about Haskell in a non trivial way. Not just youtube videos, but books that teach you the language from first principles. You need to understand the IO monad. And why it makes Haskell pure and how it forces you to organize your code in a completely different way. This is not an easy thing to understand. The IO monad, when it appears, infects your code with the IO type and makes it extremely annoying to get rid of. I had a friend who learned Haskell and hated Haskell because of the IO monad. He stopped learning haskell to early and he never "got it". If you reach this point you have to keep learning about Haskell until you understand why things are the way they are with haskell. Just remember this: the annoyance of the IO monad is designed like that so that you write your logic in a way that doesn’t allow the monad to pollute most of your code.