Good points, Montressor. Also, Byrne faked himself out once, having his Superman remember the Superboy from Earth Prime when he met the Superboy from the Pocket Universe. Then it became a sort of editorial mandate later that that memory didn't happen.
How many years I thought, naively, that it would all be cleaned up one day…*now I still don't know what was in continuity in the New 52 reality, which is already gone!