While I am not an expert at PLs, one thing they definitely missed for a language that claims to be "built for scale/multicore" is immutability. Not only is it n

While I am not an expert at PLs, one thing they definitely missed for a language that claims to be "built for scale/multicore" is immutability. Not only is it not default for variables to be immutable (like many functional/hybrid programming languages), but there is no notion of immutability built in to the language in the first place.