Thanks a lot! I have never worked with RethinkDB specifically, but I can assure you - it's only one of many names in the DBMS graveyard. Most have probably died

Thanks a lot! I have never worked with RethinkDB specifically, but I can assure you - it's only one of many names in the DBMS graveyard. Most have probably died because of inability to monetize open-source software. For DBMS startups, which don't offer an order of magnitude improvements, the problem is convincing any one to replace a fundamental piece of infrastructure. For disruptive startups the problem is even bigger. As soon as you go open-source, all of your competitive technological advantage is gone.