I think its a reasonable option and the webapp.io people scaled it out pretty high. At Zapier we utilize RabbitMQ heavily and I cannot imagine scaling the amount of tasks we handle each day on postgres.
This article mostly is lesson learns and misconfigurations of RabbitMQ though. Which is probably a good reason to simplify if you don't need its power. No reason to have to learn how to configure it if postgres is good enough.
https://webapp.io/blog/postgres-is-the-answer/
I think its a reasonable option and the webapp.io people scaled it out pretty high. At Zapier we utilize RabbitMQ heavily and I cannot imagine scaling the amount of tasks we handle each day on postgres.
This article mostly is lesson learns and misconfigurations of RabbitMQ though. Which is probably a good reason to simplify if you don't need its power. No reason to have to learn how to configure it if postgres is good enough.