When it comes to helper functions on existing types, I feel like you really can’t have too many… within reason. If we added like four new kinds of object/map,

When it comes to helper functions on existing types, I feel like you really can’t have too many… within reason. If we added like four new kinds of object/map, that complicates things… but just formalizing more common access and iteration patterns for existing structures seems low risk. What I can’t wait for are all the set operations that would make ‘Set’ truly powerful.