Well there are some pieces of gear in general that can no longer be obtained and for a game to continually grow and add more expansions there needs to be more space. I have every weapon from every raid and special events that can no longer be obtained I raid and play crucible a lot and I have a lot of guns and armor I use for different builds. Honestly I believe the best solution is to the have set vaults for each expansion. Each expansion should have a separate vault space to fit in that category maybe that would help eliminate the no vault space because people don't have room for the upcoming rise.of iron only reason I have no space now is because I'm stashing them until after rise of iron for legendary marks