Relational database now owned by Oracle (after Larry Ellison's acquisition). 'Seriously different now' — a valid modern choice: JSON operators, window functions, full-text search, and supports in-memory tables (unlike Postgres unlogged, which may still touch disk). Often faster than Postgres because of its MVCC strategy: updates happen in place and a rollback segment in a secondary table handles concurrent readers — cheaper than Postgres's write-new-row + VACUUM because most transactions commit quickly. Used in production by 37signals (Basecamp/HEY). Earlier closing-Q&A in another talk: putting MySQL's data directory in RAM via a Docker Compose line cut a ~10-minute test suite to ~1 minute.