1. RethinkDB is a document orientated database, you store data very similarly to how you would in MongoDB / CouchDB.
2. Relational == Meh? Please elaborate, we're all waiting.
2. Relational == Meh? Please elaborate, we're all waiting.
That's why there's a whole bunch of ORMs, with varying degrees of magic. It's also the reason some people were crazy enough to use relational DBs for key-value storage (eg. Reddit).
Please try and give reasons rather than restating the assertion.
The points in the blog post apply to most non-relational databases.
I have no doubt that document stores save you a bit of time in the early stages of a system. Not sure if I'd trust them to be reliable in the long run as your application-stored schema changes over time, though.