Just a suggestion,
When weapons become sunset, one of three proposed options:
1. make them become craftable with a sunset light level cap. This will make craftable requirements remain relevant.
2. make them purchasable on the collections tab with a random roll. Basically players keep buying until they get the rolls they want (keep sunset light level cap)
3. "save a gun/roll" system where you hit an option to safely save and dismantle a sunset item and still be able to pull the exact roll from the collections tab
I think these solutions may resolve much of hoarders issues. just my humble opinion