On 13 November 2013 18:20, Joachim Breitner <mail at joachim-breitner.de> wrote: > One main advantage of dlist if of course that it comes with instances > (Monad, Functor, etc.) I consider these instances a disadvantage of DList as you have to metamorph via a List to use them. As this isn't germane to the debate, though, I'll crawl back under my stone.