I'm actually a fan of rabbitMQ generally, but I'm not sure I'd put it in the category of notoriously reliable software. It can throw away acknowledged writes (afaik https://aphyr.com/posts/315-jepsen-rabbitmq has still not been fully fixed).

50k messages/day is pretty low throughout and under that load it should plod through just fine.

Under much higher loads than that (10's - 100's millions of messages day) I've seen it die in a pretty ungraceful manner. At that scale, Kafka is a good candidate.