> Do I have to obtain whatever whizzy new controller you've come up with in order to work with your packages?

> Do I have to do this when everyone has come up with their own whizzy new controller and I need to fit their packages into whatever I am trying to write?

that's the while point. If we could agree on a standard serializeable model, each controller would ensure the link between the view and the model.

user could open a package in any IDE / environment. The environment's controller would display the model in its own / user preferred view.