> a tree of if's becomes impenetrable Even in that case, a tree of if's isn't that bad (it's not great), but far worse is when you have the same set of if stat

> a tree of if's becomes impenetrable Even in that case, a tree of if's isn't that bad (it's not great), but far worse is when you have the same set of if statements copied and pasted around dozens of places. Because you will forget to update one of them at some point.