Really well written article. It's the best explanation to date of the vision and purpose of Gutenberg - should be part of official documentation IMO.

It sure is an ambitious plan though and seemingly a long way from the current plugin. Doing all that they plan to do while maintaining backward compatibility and not inciting a riot from folks scared of such a big change isn't a task I would want to take on. So if nothing else kudos to the team for its courage.