The point of it was they introduced new materials with every expansion but after a while people built up an excess. As you would with anything if you don't have anything [i][u]to use it on.[/u][/i] Then, when a new material was introduced, the old would become completely irrelevant even though you'd still earn them (doing Daily missions and getting Ascendant Materials, as well as public event packages etc). When a new expansion releases, they haven't been very good at making sure old materials are being put to good use. I think making planetary materials purchasable was a great idea. I think making weapon parts purchasable is a good idea too. But we wouldn't even need to make them that way if they left things alone. Or if they lowered the amount of weapon parts required for upgrading nodes or infusion.