Even if you don't reuse a function it still encapsulates certain things. By looking at the name you know what it does (self-documenting-code). The interface tel

Even if you don't reuse a function it still encapsulates certain things. By looking at the name you know what it does (self-documenting-code). The interface tells you what variables it depends on. And finally it logically segregates your code. I think the real reason people don't like small function is simply code navigations - which honestly is a poor excuse. That's an editor/IDE problem