As discussed in the chat over the last few minutes, the simple app documentation's dependency on an ad-hoc static object for stateful storage quickly becomes contrived when the model it seeks to represent maps one-to-one with the concerns of the component. One David Wraith was struck by edge cases in the model design that would be nullified or easily mitigated by binding the model to the component state.
The received implication of the simple app model is that "stateful components are bad" but for this example stateful components are a solution that avoids state management problems.
PR forthcoming.