The summit in Sorrento (at the 9th! Plone Open Garden event hosted by Abstract - kudos and deepest thanks!) gave us a chance to gather as a community expressly to discuss and decide on many important questions relating to Plone 2020 and beyond.
A brief recap has been posted as a plone.org news item:
and the summit report has been added to our roadmap:
Please read it through - it was a tremendously productive summit, covering technical and non-technical questions, and I think you will agree that it shows Plone's continuing viability as a product, framework, and community.