A lot of the reason is /because/ it’s hard to use. Discussion on Libera Chat (formerly Freenode) is usually higher quality than on your average discord channel for example, no doubt because people who go to the trouble to properly set up an IRC bouncer and learn the other idiosyncrasies of IRC are more interested in having serious conversation.
On the technical side, IRC is a very simple protocol compared to all serious alternatives. There are clients to satisfy anyone’s needs, no matter how niche. There are less distractions for those of us who only want text.
A lot of the reason is /because/ it’s hard to use. Discussion on Libera Chat (formerly Freenode) is usually higher quality than on your average discord channel for example, no doubt because people who go to the trouble to properly set up an IRC bouncer and learn the other idiosyncrasies of IRC are more interested in having serious conversation.
On the technical side, IRC is a very simple protocol compared to all serious alternatives. There are clients to satisfy anyone’s needs, no matter how niche. There are less distractions for those of us who only want text.