But there is a fictional environment in which the characters - PC and NPCs alike - inhabit, even if it's a undefined post-apocalyptic wasteland. That's a setting. Whether it has an elaborate, predefined history and geography like Forgotten Realms; a lightly sketched out one like BitD; is created collaboratively prior to/during play as in Microscope; or is simply implied doesn't matter - it's still a setting. This reads to me like you have an overly narrow view of what you consider a setting.
No one disputes that RPGing involves setting. (Except perhaps in some very marginal and/or avant garde instances.)
@AbdulAlhazred is pointing out that the setting, for AW, is not established or prepared
ahead of play.
Okay, but I never said anything about it being owned? I said the setting was the purview (i.e. responsibility) of the GM. And Harper said "the MC is in charge of the world: the environment, the NPCs, the weather, the psychic maelstrom", which sounds an awful lot like my assertion. And I'm not seeing a meaningful distinction between that and what you've said here:
he GM is still in control of all the things the GM is typically in control of in a trad game, right?
When you read Harper's blog, do you notice the bit about
the player establishing that the slavers use ears for barter?
Did you read the excerpts from the AW rulebooks that I posted, including this (p 113): "It’s especially important to ask, the first time each character opens her brain to the world’s psychic maelstrom, what that’s like for her."
You are drawing "the line" in a different place from where Harper does, and where the Apocalypse World rulebook does.
When people in this thread have talked about doing this sort of thing in a trad game, pemerton has considered it to be GM-driven/centred, but apparently player-driven in AW, or whatever games they've personally run. It really comes across as "that doesn't neatly conform to my specifics tastes, so it's GM-driven (read: bad), not player-driven (read: good)."
Do you know how the threat map is established, and used, in AW?
I know how AW works. It has almost nothing in common with "trad" play of the sort that is based around a GM-authored setting, GM-authored situation where the GM sets the stakes, map-and-key resolution, etc.
Whether your Vampire game more closely resembles AW or more closely resembles "GM-authored setting, GM-authored situation where the GM sets the stakes, map-and-key resolution, etc", or is different again (eg maybe it resembles Burning Wheel), I don't know. If you've posted this sort of information upthread, I've missed it or forgotten it, sorry.