That's a janky workaround. You have support both the old and new features/behaviors in one app, and push an update that wraps the old and new features in code l

That's a janky workaround. You have support both the old and new features/behaviors in one app, and push an update that wraps the old and new features in code like 'if(IAP_X_ENABLED())'. Any architectural refactorings aren't compatible with that model, so you'd have to launch MyApp2019 and MyApp2020, and hope Apple lets you do that.