alt Hacker News> chat with other humans about real-world topics
You can do this with regard to a MUD too, but typically out of character and not every MUD would allow OOC chatting within the game world, as that is disruptive to those players who seek immersion.
It seems to me as if you may not have found a good roleplaying MUD back when you played MUDs. You may be missing out on that experience. I retired from playing MUDs about 11 years ago permanently, but the in-world roleplay was the only thing that was interesting to me since it was the creation of a unique storyline potentially involving many other playercharacters.
I think I just don't really vibe with roleplaying in realtime with other humans, to be honest. I grew up trying to play tabletop RPGs (my dad was a DM and used D&D mechanics as a way to make storytime more engaging), but while I really enjoyed making up characters, I never had much fun actually doing a campaign.
The thing I love about computer games is that I can go through them at my own pace, pause whenever I like, hang around looking at a cool visual, go back to an old save and try something different, whatever. Multiplayer takes all that freedom away because everything has to progress on somebody else's timetable, which isn't as fun for me. Nowadays being expected to perform on a time limit just reminds me of work, which is the last thing I want when I'm playing a game.