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.
Previous open thread
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.