could you have the planner "translate" old codes? For example, either have a button to swap to old code / new code, or perhaps move to new code every time someone presses "simulate"? Changing any item in the grid updates the code to modern. Good enough for me, I stopped using the mobile app anyways
If we are moving to a new way of coding, it would be nice to have a way to translate the old codes without building from scratch.
If we still have something using the old code, it would be nice to translate the new to the old.