Earlier quoted context omitted.
That's one of the wildest things! We had the technological capacity to run Unix systems with several hundred users simultaneously and access at the speed of thought with 26kbps modems back in 1992, complete with instant messaging and personal directories! What happened?!
In Usenet’s particular case it was its open, unmoderated nature that killed it - once it became 99% spam, warez and CP most ISPs dropped it.
Anyway, there was a certain barrier for entry so there were less users and messages. But some really good experts posted there. And some really fun jokers.