Worked with friend on a new idea (while also trying new tech across the board), ended up in this: http://simondlr.com/post/26360955465/dynamodb-is-awesome-but When we got traction, we wanted to change databases, but because it was just a weekend hack no one wanted to spend time doing it and eventually killed the app. It was our own doing of course (choosing new tech to work with). But yes. Work with what you know when testing ideas, unless you also want to play with new tech.