As someone who uses dbos.dev, restate.dev, cf workflows here is a snippet from our Agents.md:

  Restate.dev:
    for payment integrations on northflank since its faster than cf workflows, independent of cf and its downtime and self-hostable vendor-lock-in free,
  Cloudflare workflows:
    for non critical stuff like csv/pdf report generations since it's very cheap.
  DBOS.dev:
    for workflows that need atomic messaging tied to a postgres db transaction for 100% reliabilty/durabilty(for example populating a materialized row or sending out critical email/push to a merchant).

It also has VirtualObject which is a nice vendor-lock-in-free OSS alternative to CF's single threaded DurableObject.

Where DBOS absolutely shines is

1) Atomic messaging in the same db tx as your business logic via dbos.enqueue_workflow! This is often the most brittle part of any solution and doing it atomically and durably with same tx that ran your business logic drastically reduces lots of complexity.

2) Since DBOS stores workflow state in db it should be easy to build dashboard for observability from metabase/looker(I wish restate exposed its rocksdb instance so it could be hooked up to metabase).