Right, and as someone who's used it extensively, I'm here to tell you that its value is not in being "a chat application". Its value is in being a _community_ platform, where everyone can see and hear everyone else. While private message has always been in the spec, the value of IRC has always been in offering people a place to establish common knowledge and culture _passively_ to whatever degree necessary for the channel or even server that happened in/on.
Simply by being in an IRC channel you become part of that, which is radically different from any of the other media you mention, where one has to actively go through the records (as it were) to get an idea of what's going on, and what the shared culture and body of knowledge is.
They really are very different media with a very different experience, and today the only experience that has managed to recreate the value that set IRC apart from other communication tools is Slack/Discord.
Simply by being in an IRC channel you become part of that, which is radically different from any of the other media you mention, where one has to actively go through the records (as it were) to get an idea of what's going on, and what the shared culture and body of knowledge is.
They really are very different media with a very different experience, and today the only experience that has managed to recreate the value that set IRC apart from other communication tools is Slack/Discord.