"The loot will drop again"... except when it won't, like after each expansion takes them out of the loot pool. Do you still have a Supremacy? I do. Got any of the old Painted/Primed/Sliver versions of the Crucible weapons? I've got 'em. Some of the old weapons that have perks that were taken out of their class later (like my pulse rifles with Reactive Reload)? Any of the original Vendors/Faction guns and gear that won't even come from the rank up packages? I got it. There is plenty of reasons to keep stuff, because [i]you can't[/i] just assume "it will drop again"