Three weeks past the Iceberg Summit, the lakehouse projects shifted from in-person alignment back into shipping mode. Polaris cut its 1.4.0 release and immediately followed up with a Python CLI 1.4.0, Arrow shipped its 24.0.0 major release and kicked off an arrow-rs 58.2.0 vote, and Parquet's design lists stayed dense with proposals on footers, page encoding, and a new java release discussion. Iceberg's dev list was quieter this week as contributors digested summit follow-ups and continued narrowing on V4 design questions in the background.

Apache Iceberg

The post-summit wave of formal proposals continued translating into design work this week.…