[bfrog]

I still use it, because Freenode is an amazing resource.

The fact that matrix/discord/slack are becoming more common in open source projects makes a bit sad, matrix a little less so but still. Matrix is neat in its idea of federating without having to trust other matrix servers, but the protocol is less than friendly in many ways. Its not nearly as simple as the REST JSON API the docs espouse. If its any indication of complexity there's really only one defacto matrix server implementation, there's dozens of IRC implementations. Client implementations are a little more abundant but with a wide array of feature support.