you know for the weird ire some osr lovers can have form the rules light narrative games or vice versa i have to say they hold a lot of the same appeal to me. both are very "stop looking at your sheet" kinds of approaches. the sort of narrative openness presented by a hexcrawl or megadungeon osr thing also makes me think of the "make problems, not solutions" aspect of pbta games. like yes i have all these factions in my lovely dungeon of murder and mayhem but i don't have a set plan for what these guys are for or how the players should interact with them. they're just fucking there for the players to interact with in a way that will ask a lot of me on the improv front.
they also tend towards rules lightness which is nice.