I can definitely get behind the retainer interface being changed. Players have been asking for this since the relaunch. But hoarding is hoarding. there is no reason (unless you are actively farming/crafting specific items) to really need more than 999 of any item? Im an omni crafter, and i craft all day when I play most days and even then I barely have to go out and farm beyond 999. Even when I scrip farm, or food, or potions.
So yea, hoarding is a thing