I asked the DBOS folks about this before; the idea is that there is no "coordination node", only the workers and the DB. See DBOS folks previously: https://news.ycombinator.com/item?id=45186494

Exactly, Postgres as an orchestrator instead of a Temporal server as an orchestrator. This page goes into more detail (for DBOS, but DBOSify is the same principle but using the Temporal API directly): https://docs.dbos.dev/explanations/comparing-temporal