[samiralajmovic]

Discarding previous knowledge where it is applicable and simpler is obviously unwarranted. Similarly to how we utilize Newtons laws within a lower energy and mass range, we should prefer the simpler equations where they make sense. However, I'm not sure that a for loop is actually simpler than map reduce as it depends on the context. Who is reading your code? How complex is the code inside the for loop? What kind of problem are you solving? The vocabulary associated with functional programming is better equipped to handle mathematical expressions than imperative code and in this case, simpler.

In essence; adding complexity for the sake of complexity or to come of as intelligent is bad...