[BoyRobot777]

>While they're about it, they should also add immutable/copying data structures.

They will start with records[1], but I think all value classes (Valhalla) should have this functionality eventually.

You will be able to write:

   record Point(int x, int y){}
   Point pp = p with { x = 3; }

[1]https://github.com/openjdk/amber-docs/blob/master/eg-drafts/...

[JulianMorrison]

This is definitely good, but I'm also meaning Clojure style lists, maps, etc where you can treat any given copy of the entire data structure as one big immutable value.