With the upcoming expansion, there will be significant changes to the item economy in Destiny 2. We’ve listed which items you can safely dismantle before Forsaken and which ones you should still keep.
Along with Forsaken, new weapons and armor will come, as well as changes to existing items for Destiny 2 players. With regard to the upcoming collections, we’ve put together a brief overview of which items you can part with without remorse and which you should absolutely keep until Forsaken.

Shaders
Bungie will overhaul the often-criticized shader system with Forsaken. It is planned that the colorful consumables can be drawn from the new collections with the expansion. This way, players should have access to all shaders they have already obtained at any time, provided they possess the necessary resources.
Applying shaders is intended to be free with Forsaken, while drawing consumables will require the respective “currency”. For instance, you’ll receive Eververse shaders for Glimmer Dust, while others cost Legendary Shards or Glimmer.
According to Bungie, the game will track which shaders you have already unlocked. This means that you can delete shaders currently in your inventory without any guilt.

And it’s just in time, because with Patch 2.0.0, the long-desired mass deletion of shaders will be introduced. However, there are two small caveats: You can only delete stacks of five shaders at a time and not directly in your inventory. For mass deletion, you’ll need to visit the Cryptarch, who has this option hidden on the second page of his offerings.
Mods
The mods in Destiny 2 will undergo a fundamental change with Forsaken. This means that your current Year 1 mods will be useless with the upcoming expansion. So you can already delete them to recover the still-valuable mod components.
It is best to convert your blue mods to legendary mods at Gunsmith Banshee. Dismantling legendary mods will guarantee you mod components. However, dismantling blue mods has only a certain chance of yielding components.
Legendary Weapons and Armor
Forsaken will of course bring a lot of new gear that will have random rolls. This just begs to clear out your vault again. Additionally, you will still find the weapon parts and legendary shards useful in the expansion.
Bungie stated that all weapons and armor you received after the Warmind DLC will also be stored in the upcoming collections. The vault space has been expanded again, so you should still have enough space for the new items.
If you still want to clean up but want to ensure that you don’t destroy any gear that you can’t pull from the collections, you should visit the website Destinysets.com. By linking your account, you can see which weapons and armor will be in your collection.

Items You Should Definitely Keep
Weapon parts, Vanguard and Crucible and Iron Banner tokens, mod components, legendary shards, as well as masterwork cores and destination materials will remain relevant even in Forsaken.
Planet tokens have not been issued since Patch 2.0.0 and have been replaced by destination materials, but can still be exchanged for reputation.