I don't understand memory limitations.
They could always make a system where once I get say relic weapon. Why can't I trade it to a Npc who essentially destroys it and just puts a little check mark on my account so if I need it again the game can "re-create" pretending it's the same peice of gear
Isn't that what those AF armor NPCs did in FFXI? They were basically AF vendors that only gave you for free what you had already. Obviously any dyed gear would be changed back to neutral color.