I have roughly around 46 days of playtime, and scrounge for weapon parts on a daily basis. I had about 2000 when TTK hit. I used about half to level DO up and saved the rest thinking that would be plenty. Which it should be! I have weapons fully upgraded but no parts to do so. I even usually end up dismantling exotics waiting on parts for their parts to use on other weapons, since I can buy back the exotic later. The elemental materials that people bitched about farming in the beginning was nothing compared to this. Bungie has to change it or at least make the same options available across the board for ALL materials.