I actually don't buy the server resource limit argument on Armoire. All you need for it is to store the item iD. That's it. Because each item stored inside is reset to its default status, it clearely doesn't need to store anything but the item ID. Retainer, yes, I can believe that. But the Armoire?

I believe it's mostly just part of a marketing strategy to promote the additional retainer subscription, and partly just the development process being too rigid and nobody really want to be "that guy" who points to the elephant in the meeting room.