+1000 to get rid of keys after use
or
after their intended lock got opened (if you forgot about a certain key and lockpicked the door, blasted it down, etc)
Because of magic pockets, the game already uses the key from wherever it's at. After a while, I don't know if it used the Elegant Key, the Rusty Key, the Old Key, the other Old Key, the Old Key in position 3,5...
The keyring would reduce clutter but it wouldn't reduce file bloat. Because there's all this garbage that sits and rusts in your pockets... for some reason...
Something something realism I guess...