I've literally never heard of anyone playing it [PbtA]

It's my favorite TTRPG! I've probably played more Apocalypse World than anything else.
I will say that it won't work for every group; it has a tendency to go PVP, and the players need to be able to handle that. However, because it doesn't shy away from PVP conflict, the MC gets to be more of a player than in most other systems (even other PbtAs). I've run in so many different settings, too: an interstellar colony ship 200 years into it's voyage (and 50 years after a war), a military base that got time-portaled to dinosaur times, a waterworld archipelago, etc. I've played campaigns where I ran a taco truck or killed an eldritch god, and they were both just as compelling.
Play some Apocalypse World!

I played Apocalypse World once at Origins.
Long after I'd been running Masks and Dungeon World.

I've played Masks for a little, I might get my group to play Armour Astir, or girls by moonlight, but I need to find something with less politics, life burns me out of it.
- GbM is Forged in the Dark, but I get your point.
  
  Shows what I know. Too many games I have, waiting to inspire me enough. Monster of the week is also tempting. (For forged, beamsaber was fun, but politics became too real, I couldn't make cartoonishly evil political figures that weren't also real)

My fiancee played a whole campaign of Apocalypse World! She enjoyed it!
- Oh, hey, I love your comics! I wonder which edition it was: 1e, Burned Over, or 2e?
  
  I am assured it was 2e

I've played Monster of the week and Apocalypse world and Dungeon world. It's a great game!

Which is very amusing, because a lot of PbtA games don't really follow Apocalypse World that closely! Its a game that has intricate mechanics for driving and combat, not to mention running gangs/cults and being fairly deadly.
2e also has sex moves, which not a lot of people are fond of (and Burned Over/3e made off with those)
- Wait, wasn't Burned Over a toned down version of 1e, with 2e being later?
  
  To my knowledge, Burned Over is the PG-13 version that was made after 2e, but I might have gotten the order of release wrong

I played two PbtA games but neither was Apocalypse World. Which is weird sicne I ehard it holds up and has no controversies, unlike Dungeon World.
- I heard DW is getting a second edition. Now that I think about it, I don't think post-apocalyptic TTRPGs are very popular in general.
  
  i guess they hit a little too close to home now...

sup
I might have preferred Monsterhearts initially, but after that it was easier to get Apocalypse World. Not my favourite Baker game, that's probably In a Wicked Age, but it does clearly show a more mature design.

I've played a fair amount of PbtA and close relatives, mostly at a meetup I go to that does one shots. Never seen anyone playing apocalypse world.
I don't really like pbta that much, though, so I'm not seeking it out.

Huge fan of PBTA's.
I've played a masks campaign for two years, ran some Thirsty Sword Lesbians (love it), Dungeon World (not a fan), Blades In the Dark and might get to play some Urban Shadows.
I would love to play Apocalypse World since pbta's are my favorite styles of systems so far and playing with the original material would be fun.

Have played Apocalypse World. And kp4s, too. Baker's best game is the one he disowned, Dogs in the Vineyard. I dislike PbtA systems - any game whose dice rule could've been used to play Monopoly isn't an RPG with mechanics that interest me.
Plus, I hate the core concept of having to constantly describe my own failures. If the DC is so high that I can barely ever succeed, I just won't do anything that requires a roll where I don't have at least a +6 and some variety of points to spend. That behavior has gotten me to have to leave two different PbtA one-shots early, because I refused to make moves that weren't guaranteed in some way, or where failure wouldn't be able to hurt me or allies.