“Clean” Code, Horrible Performance offers a good argument against it purely from a performance stand point. Well worth a watch. But it also does not even make code easier to maintain. It just smears logic all over the place and makes it harder to understand what is going on. Trying to follow clean code principals just makes your code worse. And if you try to point that out to anyone they just say you are doing it wrong with no proper advice on how to actually improve things.