Not at all. Simple things like instanceof / typeof checks can be resolved without a static type system. Because with a const everything is known about the const in question. Obviously the const prototype may change but then again if the const has a frozen prototype - that too can have static analysis applied to it.
I am simply repeating the well-known benefits to immutables which is completely orthogonal to a type system, static or otherwise.
I am simply repeating the well-known benefits to immutables which is completely orthogonal to a type system, static or otherwise.