That syntax certainly fixes a major problem when dealing with immutables. The mutable-like syntax I find is the cleanest way to construct complex data types. I

That syntax certainly fixes a major problem when dealing with immutables. The mutable-like syntax I find is the cleanest way to construct complex data types. I keep thinking about using only immutables in my language, but I don't think it will be possible. I'm intending to a be a system language, and there are simply too many situations where you need to modify data in-place. I'm struggling to see if I can still find a place for immutables in situations where they work fine.