This podcast episode delves into the origin story of Apache Druid and its unexpected wide adoption as an open-source real-time analytics database. It explores the core data structures and key features of Druid, as well as its evolution in the changing technology landscape. The episode also discusses the journey of Metamarkets, the company that developed Druid, and the value it brings to various use cases. Additionally, it highlights the importance of user experience and developer experience when designing data tools, and the three values embraced by Rill for a better user experience: simplicity, speed, and scale. The episode concludes by discussing the evolution of business intelligence (BI) tools and the role of the data lake as the foundation for modern data architectures, as well as the impact of AI on BI. Overall, it provides valuable insights into the world of data management and analytics.