I do love Postgres and DBOS.

I also recently started experimenting with https://github.com/earendil-works/absurd which is also Postgres and even simpler than DBOS. Their comparison is a great read:

https://earendil-works.github.io/absurd/comparison/

But for operational reasons I've started using sqlite for durable workflows instead. Porting the database concepts from either DBOS or absurd PG to SQLite is remarkably easy these days. A small polling loop instead of notify/listen feels fine for smaller workloads.