If you are the type that only plays one character, you probably don’t have very much trouble managing your screen arrangements. You have one, sometimes you need to adjust it, but since you are only playing the one character you probably know where everything is quite well.
Or you could be like me and play 19 characters (on one server alone), characters that are by design each unique, each containing capabilities that are as variant from each other as I can make them. Meaning, they may need different windows arrangements too.
Nineteen completely different arrangements would never work; I would never be able to find anything. Ever.
So instead, I’ve come up with just one generic layout, and I make them all play within it. Thank the gods for the ability to save and recall layouts. More on that below.