in reply to Re^3: Does perl6 have a native linked-list data type?
in thread Does perl6 have a native linked-list data type?
... That's correct, but I honestly don't understand the point. If you want lists, you just use the built-in lists. ...
The polymorphism would be useful. Sometime you don't care about the implementation - you just need an object which has some of the properties of an array (like the ability to perform map and grep on it.) In that case you can return a real array or a chain of CONS cells whichever is most convenient.