It was definitely not a MMO! It was a bit of a joke comment (British humour - sorry). I’d be amazed if it had anything more than 100 consecutive players (that’s a complete guess).

I had no idea of it’s MUD heritage then and it’s only today that the comments above have really made me join those dots up.

The 300 baud was 1983-84. We must have been near the era of 14400 by 1990, but yeah, definitely 2400.