If you look at the livestream a few weeks back, I asked Rogean about specs of the current server base and while he kind of avoided a detailed answer for Project 1999 he did state that many people run small servers inside virtual machines.
If you're not looking to host more than a few dozen people, that should be able to do it.
I'm looking at possibly doing something along the lines of Project 1999 (only going to POP without the damned books).
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