I do Django freelancing and have had a fair amount of small clients with relatively few users. Adding workers and a message broker adds a lot of complexity over just a single Django server. I even had the thought to build something like this but looks like someone already did! Thanks for sharing this, looks like a great tool to know about.

Why not the battle tested celery?

Battle tested Celery has dropped the ball so many times during operations and updates, that I would be very uncomfortable giving that recommendation.

Here's a really good article about why you might want to involve your database in queues (short version: transactions): https://brandur.org/job-drain

See article?

But also, Celery has an awful DX. I think the question is more, why do I need celery when Postgres can do the job itself?