I've seen breaking changes mentioned in this issue for upgrading
This got me thinking, what happens to existing contracts when a breaking change to ink is introduced?
For example, we're currently on ink v4.3.0. Let's say a breaking change is introduced in ink v5. How would my live contract fair when RPC nodes upgrade their
pallet_contracts pallet to ink v5? Surely this would be a breaking change for my live contract on ink v4? How is this handled?