I've been exploring the Pastanaga UI project and went through the concepts it follows, laid out by @Albert and also what's been discussed in the community with @tisto
But I was unable to find any live versions of any implementations of Pastanaga UI that could I check out to understand it better.
plone-react implements Pastanaga UI and we just merged everything upstream at the Plone-React sprint in Bonn. We plan to set up a demo site by the end of the sprint...