Great book! Graph databases are useful, but I'm not sure if they're still a great interface for a direct human interface. Problem is listing links and finding connections is tiring for us to do.

That said, with enough automation and context-aware software, graph dbs start looking like a great idea.

SQL vs NoSQL is a perfect example of schema-on-read vs schema-on-write, even though with jsonb in postgres and more templates in Mongo you can use both either way.