There already IS a way in which people can save pratically unlimited amounts of items - character muling. I'm sorry, but your argument does not make much sense.
There is no ETA on extended storage space, and even when it will be there, it will not be unlimited as it was with PlugY. Stop keeping items you can always re-find in minutes like runes, and turn the unique items that are of no use for your characters into signets. Make use of storage items like shrine vessels, arcane crystal clusters, etc. If all this space is not plenty for you, it much likely means you're hoarding, and for what really? The sad thing I've observed over the years with people hoarding, often reaching hundreds of PlugY stash pages is, more often than not, they never ever actually use a huge part of these hoarded items. The plain truth is, you don't need to hoard every items. Whist wrote:People on multiplayer have been playing without an extended stash for years and they were fine, and that was before the character's inventory, cube and stash got heavily expanded in size.