That there is a hard cap as to how many people can really be logged in at one time?

I'd be curious as to what the number actually is if so.
100 players all online would be one intense MUD. People would be con dying in 150 hours.

But I could actually see it happening in 20 years, when a lot of us former CFers would have kids out of the house, and more free time than middle age currently affords many of us.