I am not crazy about the idea of making existing, fungible items non-fungible by adding TIRs to them. There's nothing special about Regen Chips; I would apply this preference to what happened with Attack Chips and other items as well. It sucks buying a copy of a fungible item and then having it lose market demand because MindArk changed the system and you rolled a low TIR.
I appreciate that this concern might in principle be outweighed by stronger considerations. Switching from ten TIRs to one sucked for me personally, as I had collected several items with purely three-digit TIRs, and they instantly became rather unremarkable. However, I recognize that the new system is superior. Still, I would prefer that we either ditch TIRs and make copies of items completely fungible, or implement a way to modifying an item's TIR (X amount of Vibrant Sweat to move an item's TIR up or down by 1 point, perhaps reintegrated with the Tiering profession?), before adding a tier system to more items.
