I never used ZeroMQ (visited their webpage many many times though) but I totally agree that going through the pain, struggles and subtleties of message queuing

I never used ZeroMQ (visited their webpage many many times though) but I totally agree that going through the pain, struggles and subtleties of message queuing is a very valuable and important learning experience. I had those experiences with RabbitMQ around 10 years ago when I pushed the team I worked for towards a message queue solution to scale our distributed test system. It turned out successful but it took quite a while :)