Reading #TheShadowOfYesterday on the toilet just now, having read a lot (and run a bit) of #PbtA recently, I'm struck by both the similarities and the differences.
In the StoryGuide/GM chapter, it talks about how your job when starting a game is to first inject some content, but the mostly sit back and react, to "wait for pauses in the game, moments when the players don't really know where to take things".
Which is pretty much half of "When to make MC moves." of #ApocalypseWorld.