With the new migration features I believe the tags:
- belongs-on-serverfault
- belongs-on-superuser
- belongs-on-meta
- belongs-on-stackoverflow
- not-programming-related
are no longer necessary. All they do is add useless clutter to the tagging system. We know a question belongs on superuser.com because it was migrated there. Let the close system handle this.
I used to believe these tags were necessary for those with less reputation to "alert" those with enough rep to close, but there are enough with close privileges to handle this now.
belongs-on-x
, at least until it "dies out." Right now if someone tags it, five other people might be inspired to do the same thing next time.