Yeah, Alpha in 1995. I remember the server crashing all the time. Everyone would login at the same "starting location." We all wore red(?) pantsuits. You would "try" to move to the right with everyone else and ooh the lag. Eventually they put in a troll ... I think. I could never get far enough in to see most of the new things before I would crash.
To me, the heyday was 1996-2000. Thousands of people used to be on at any given time. You learned to avoid certain high-traffic rooms, like Jumper Corner (which most lowbies would want to avoid anyway) because you would crash with your crumby dialup connection and low-spec computer. :)