I could drum up a few thoughts on why to limit armour or weapon storage, but none to limit the number of emblems, ships, Shaders...etc. that we can store. I saw some lazy BS about what can fit on the screen you are viewing, but you are omitting the possibility of subcategories you select, then your entire screen can be devoted to storage slots for that item type. In any case, if I play along with your idea, then make one of the vault stands in the tower a different colour and devoted just to "General" and the other one for Armour and Weapons. That way you can fit probably 100 items into the General Vault. I personally like collecting shaders and ships and emblems. Its getting to the point where I need to start storing Class Items (Warlock Bonds in my case) as well.