They’re trying to implement it while still being able to shader everything individually.(Not part of the original design.) They’re trying to make a Kiosk too. If they C&P it it’ll be full of old shader code and it’ll take awhile to weed it all out. They’re also trying to make sure you don’t lose items after mass deletions such as Glimmer and Bright Dust. The old code is also on an older engine so it wouldn’t work anyway with a C&P.