Book: Database Playbook My project: Hermes IDE | GitHub — an IDE for developers who ship with Claude Code and other AI coding tools Me: xgabriel.com | GitHub PostgreSQL 18 shipped on September 25, 2025 . If you skimmed the release notes during sprint planning and filed it under "minor upgrade," go back. The five things that landed in this release are exactly the five reasons your team had a "we may need to move some workloads to Mongo / Dynamo / Cassandra" doc on Confluence in 2023. You can stop maintaining that doc. Most of the workloads you flagged for it now have a viable Postgres path, with one schema, one operator, one backup story. Five PG18 features. What they replace. Where NoSQL still wins. And the JSONB schema that does what people went to Mongo for. Async I/O changes the throughput conversation The headline feature is the asynchronous I/O subsystem.…