I think the idea is that, yes, under the current system, things like account-wide items are impossible. But, you know what else was "impossible?" Increased inventory space. But, with the release of Stormblood, we got an increased inventory and eventually got Chocobo Saddlebags as well. These options were created by SE thinking outside the box to give the consumers what they want. They can find a way to make more items account-wide, we just have to give them a reason to search. Showing that there's demand for account-wide items is important, just like it was important to show SE that we wanted increased inventory.