Provide non-trivial example with multiple views

[cmeeren]

I'm interested in Elm-like architectures for Xamarin.Forms, but I don't immediately see how this library can be used in non-trivial cases. Some questions I have:

1. How would you do navigation (modelled as a side effect, perhaps?)
2. What to do when the state grows so big that a single record type becomes unwieldy?
3. Should each view have its own MVU components? If so, should they be in some kind of hierarchy? (Otherwise I assume different MVU groups can't incluence each other in any way.)