The release of Class Warfare inspired us to switch our long-running (but basically casual) #Ptolus campaign to Dungeon World. Given the characters were in the high-mid levels (Pathfinder), the game has a much different tone than out-of-the-box Dungeon World, and required creation of custom stuff to match the characters better (such as spontaneous caster and alchemist specialties).
I’ll be posting more about how it it is going in the Hacking Ptolus community.