Episode 81 of The Data Business Podcast. Lucas and Luna explore how open table formats—Apache Iceberg, Delta Lake, and Apache Hudi—are reshaping the data lakehouse landscape. They focus on Iceberg's rise to dominance, the engineering decision at Netflix that kicked it off, and why the format war matters for anyone building a modern data stack. Specific numbers: Iceberg adoption grew from 15 percent of data lakehouse users in 2022 to over 60 percent by early 2026. The discussion covers transactional guarantees on object stores, catalog integration, and the painful migration story at a mid-size fintech that switched from Delta Lake to Iceberg. No fluff, no vendor pitches—just the real trade-offs data teams face today.