Yes, in ArrayLists ... etc., but if you want compact values on the stack, or compact value data structures you don't need this. I feel like 80% of the solution

Yes, in ArrayLists ... etc., but if you want compact values on the stack, or compact value data structures you don't need this. I feel like 80% of the solution (and one which is likely future compatible) is going begging whilst they worry about nice to haves.