IRC is great and I am using it for 14+ years already. It's stable, fast, efficient and secure with lots of options. I've written a lot of IRC bots in many languages because protocol is so easy and every language have library/bot for IRC that can be easily expanded with your logic/code.
Before there was a cloud and big data, we used IRC for handling distributed services as high availability central orchestration to which many services/servers connected that had IRC bots running on them. We had control over many machines and services from IRC channels, with full authorization/authentication, logging channels, you could run commands on one server or on many same time, you've seen real time error reporting or when node went down.
It worked great and still works great.