I'd disagree quite strongly with that.
I think the exact opposite has happened - gamism has become so completely normalized, particularly as all WotC editions of D&D have been primarily gamist in their design approach (albeit three different ways of doing gamism), contrary to the clumsy mixture of simulationist and gamist elements in AD&D. So people don't even really note that a game is gamist anymore unless it goes the extremes 4E does (and not even always then!).
I mean, just look at Outgunned and its relatives - the primary mode of the game is pretty extremely gamist, with the dice-arranging and heavily abstracted and very game-ified mechanics, but the narrativist elements tend to attract more discussion as a GNS thing, even though they're kind of secondary and mixed with a kind of genre-based simulationism.