On Discord or Slack I can copy a screenshot and send it to loads of people with simply Ctrl-V, I don't have to manually upload to some random image host website and copy and paste links which usually link to some page with a thousand ads.

I can join a voice channel seamlessly, talk to my friends, listen to music together, stream my screen, watch others streaming their screen, build custom interactive bots that manage rich media, send messages from my apps to a channel with webhooks which I can create in seconds, see what other people are playing or listening to, reply with custom emotes, create threads, add syntax highlighted code blocks, etc. I could go on for an hour.

None of the old school 1998 irc channels had these capabilities and I'm sick of everyone on HN pretending like it's the same thing. If it was, people would use it.