What is the use of system members for an non Persistable Entity?

Hi Team,   Can you please let me know what would the use of System Members for non Persistable entity.   As we know, Non-persistable entities are stored in the runtime memory and never get committed to the database. What is the point of storing the 'Created date', 'Changed date', 'owner' and 'changed by' for a NPE entity. How ever we loose data after the transaction.   Please let me know what would be the use of system members for NPE.            
1 answers

Created and changed dates could be useful if you are creating multiple NPE objects.  Also, if you have NPE's associated to a persistable object that is accessible to multiple users, owner and changedby could be useful to find a specific object.