From my point of view, the main things behind message queues (Not zMQ specifically) is guaranteed delivery, persistence, multiple-message atomicity, message pas

From my point of view, the main things behind message queues (Not zMQ specifically) is guaranteed delivery, persistence, multiple-message atomicity, message passing/forwarding, and sometimes guaranteed message ordering. Other than that, all it does is facilitate communication between different actors. Nothing magical/weird about it, just depends on whether or not you've got a nail to hammer with your MQ-hammer.