>Immutability is one of those techniques that can be leveraged to limit growth of complexity. What you're saying is perfectly rational, right down to your emph

>Immutability is one of those techniques that can be leveraged to limit growth of complexity. What you're saying is perfectly rational, right down to your emphasis on can. I don't take exception to immutability as one tool. My problem is with the notion that it is the only tool and the corollary that mutability is always wrong.