Very good points. I agree that haskell is a great language with diverse features and a lot of flexibility. I haven’t used it on large projects, but did enjoy the book “Learn you a haskell for great good”, and have worked through a number similar smaller examples. The point of the article was not to say whether functional or procedural languages were better, but to help understand the difference of approach between procedural statements and declarative ones. As you say, we need both approaches to get the most out of programming.