Delisted songs in RB4
I suggest that when listed in RB4 Database Mode, only songs which either were delisted after being made available in RB4 or which have been made re-available to previous owners should be listed on the rbdb.
Songs which were delisted before RB4 was released and which have never been possible to add to RB4 should only be listed in RB3 (or earlier) database mode.
This would make for much more efficient listing and setlist creation when playing RB4.