As a rule of thumb, if your top-level comment here received 15 or more karma, you probably should repost it as a separate article—either in the same form, or updated. (And probably post texts of similar quality directly as articles in the future.)
More generally, I’d say that if it’s longer than about four paragraphs, it’s probably better suited as its own article than as a comment.
More generally, I’d say that if it’s longer than about four paragraphs, it’s probably better suited as its own article than as a comment.