Comment by ItsMonkk

This is an interesting article because as I was reading Martin's suggestions I agreed with every single one of them. 5 lines of code per function is ideal. Non-nested whenever possible. Don't mix query/pure and commands/impure. Then I got to the code examples and they were dreadful. Those member variables should be readonly.

Using Martin's suggestion with Functional Hexagonal Architecture would lead to beautiful code. I know because that's what I've been writing for the past 3 years.