It's not that Paleo is necessarily more common amongst permies than other diets. New forums are created here on Permies when there are
enough threads to populate a new forum. I think the number is a minimum of fifty threads of a common subject. There may well indeed be fifty threads discussing vegan or keto here on Permies but have yet to be organized into a common new forum. Permies staff are all volunteers and organizing wayward threads into new forums is not high on the priority list, but generally if a member of Permies community asks, gets approval from Permies staff and helps identify and locate common
thread subjects finding enough to meet criteria, a new forum will be created. That recently happened when a member asked for a sewing forum, helped find the threads, and abra-cadabra we now have a Sewing forum. Same thing happened last year with a new Berries forum.