The conventional HN form is neutral, something along the lines of "Previous HN discussion: <link>."
In American conversational English "this was discussed like a year ago" carries the connotation that another discussion is redundant. It reads in the voice of a teenager's critique.
In American conversational English "this was discussed like a year ago" carries the connotation that another discussion is redundant. It reads in the voice of a teenager's critique.