This, too, will pass. Mutability is fine, if isolated and carefully accounted for. However, to understand when it's fine and when it isn't, you have to bring years of experience both in imperative and functional world.
I just sidestepped the issue by becoming a Haskell programmer and I'm glad I no longer have to deplete my judgement by making those kind of decisions :)
There's value in that, sure. But when programming one is generally modeling a business process, and some of those processes really are easiest to understand by thinking in terms of a thing that changes. So it's nice to have a programming language that lets you talk about things that change in a natural way.
