"Exotics". And? Y1 exotics don't carry forward either - you can't upgrade/infuse them, they're also being left behind. So once the game has taken stock of your Y1 exotics and unlocked the blueprint for the select ones that have a Y2 counterpart... you don't need them anymore. Essentially, Bungie has said "We're finally giving you much more space to store things, while at the same time obsoleting all your gear so that there's no reason for you to store any of it."