while a box is good to have it does not make the game any more satisfying to play. Sure, it looks nice on the shelf but the game to me - box or not, is most authentic in it's originally released form.
Trends also appear to be changing with rom sales being quite popular now, go back a few years and many people only wanted CIB releases.
My copy of Piggy Bank would not feel authentic if I took it out of its bag and shoved it in a box that the publisher did NOT make.