C'mon - lets not wrap it up in all that, be real. It's a JSON object and a few JS functions passed as arguments to a class constructor.

I'm not saying it isn't an elegant design, but can we pls not talk about proprietary implementations of a particular design pattern as if they're some kind of industry standard?

You're getting the data format confused with the database engine. Yes, a database might just be storing JSON, but how it's stored and replicated matters.