Allow comments on Closed ideas

Currently I see a lot of ideas being closed as "good idea but not YET on the roadmap". However when that's done, there's no way to add any comments. I think this is a shame, as especially these ideas can still lead to discussion and there should also still be room for it as they're not planned yet. 

I would suggest to either allow comments on closed ideas, to introduce a new status to the idea forum, or too simply provide an answer from Mendix (good idea but not in the near future) without closing the idea.