Every now and then I think it would be fun to run a DW game that didn’t have XP or levels, and all advancement was done descriptively. Like, you want to raise your intelligence score? Cool, how does your character go about becoming smarter? You want the “Smite” move? Cool, how does your paladin go about gaining the ability to deal more grevious blows when on a quest?
And of course, as a GM, litter the world with opportunities to gain new abilities, maybe asking the players what they’re interested in and working on the basis of that. (Maybe even replacing XP with some sort of ‘luck’ points that translates into finding opportunities for self-improvement along specific lines.)
How often has people seen or used descriptive-based advancement in their games? Like, the DM giving a player a move or a stat increase because it made sense in the fiction? How well did it work out?