I thought I heard someone mention that a page move to an existing redirect was possible?

"Move" is only allowed when either the destination page doesn't exist at all, or else it does exist, and contains nothing but a redirect to the source page and has no history. So if you move a page somewhere, you can usually move it back without having to delete the old name. But you can't move a page on top of a redirect to something else, and you can't move a page onto a name with any history.