I use a somewhat non standard level demographics in Midrea. Typical levels run from one ot three with an informal limit of 6 or 7 at most for NPC's. This selection puts me into the very high end of the "realistic" spectrum as advocated by the Alexandrian article "Calibrating Your Expectations" and allows me to make much use of one of my favorite supplements for NPC design,
ENWorld Publishing's Everyone Else .
Important NPCs and of course the players can exceed and do exceed this.
The Return of Planescape? - Curious. There is a brief note on this 'countdown' at Enworld.
13 hours ago