I think the point is they have a Postgres server running anyway as the datastore and the job queue being in Postgres gives you HA, backup and Transaction for fr

I think the point is they have a Postgres server running anyway as the datastore and the job queue being in Postgres gives you HA, backup and Transaction for free. I think Redis in particular won't give you transaction right? Needing Transactional semantics for jobs alongside an application operation makes a lot of simpler queue/tool choices difficult.