This is severely overgeneralized advice. Some traffic needs to be processed right now, and if it can't be processed within a narrow timeframe a failure needs to

This is severely overgeneralized advice. Some traffic needs to be processed right now, and if it can't be processed within a narrow timeframe a failure needs to be acknowledged and handled. Other traffic can wait an hour, but needs to eventually succeed. Why conflate the two? > What happens if that system fails to see these for whatever reason and you dont have a full-time employee monitoring dead letter queues? "What if you fail to monitor correctly" is a bad scenario no matter the architecture, but doesn't critique message queues. Any sensible message queue will have lag and backlog metrics on subscriptions, which you can monitor just as easily as an RPC end point.