Earlier quoted context omitted.
I don't have much to add, but as someone who has a lot of projects dependent on RethinkDB and also loves using it: Thank you to everyone involved!
Do you/would you use for anything other than something that needs live updates ASAP?
I really like the fact that you query the database by calling methods on an object rather than passing strings to it, feels more like actual programming and protects you from injection attacks.
The WebUI and easy scalability are great features as well.
It and CockroachDB, (for more traditional SQL, same scaleability benefits), are the databases I am most excited about, but I seem to prefer ReQL to SQL despite being vastly more familiar with SQL :-)