We should extract small functions when it helps understanding the program. Sometimes the code is clearer when we extract a one line function - non-trivial boole

We should extract small functions when it helps understanding the program. Sometimes the code is clearer when we extract a one line function - non-trivial boolean expressions come to mind - and sometimes we should keep a (reasonably) long method that is better understood as it is. As always we should adapt our approach to the situation and not blindingly apply some preconceived rule. One size does not fit all. But generally what I see in code bases is a need for cleaner code. I think real-world code suffers more from being not "clean" enough than from being too "clean". That's why I'm a bit wary of this kind of articles that can be interpreted as advocating for lower standards. It's a bit similar to articles criticizing the excess of TDD or mock-based testing. They might have a point in already mature contexts but the reality of most business software is the big ball of untested mud. We're not all DHH or Matthew Rocklin and what I see around me is a need for cleaner code and more testing, not the other way around.