It’s been ten years since the first mainstream distributed databases launched. In that time, we’ve seen hype (NoSQL/NewSQL will do everything!), disillusionment (you still can’t beat the CAP theorem), and consolidation (to basically Cassandra and MongoDB). Meanwhile, the big three cloud vendors each launched their own products, and the industry is collectively starting to understand their role in building modern applications. This talk will cover five lessons that contribute to that understanding, and make some predictions about what we can expect next.