you mean games like Arkham horror and descent? or something else?
No no, no no no, no. I love board games. Arkham Horror is great.
Microscope and Fiasco are the two that I remember being GMless, but you also had games like Apocalypse World, FATE,
anything Luke Crane has ever touched, etc, that try to codify very rigid and fixed
modes of play - you have to play the game the way the game is wrote, or basically the entire system breaks down, and the way the games work is more abstract and meta... FATE with it's Aspects and declarations that basically let players write the story when they need/want, for example. Basically, games that try to take the freeform nature of storytelling that usually goes on in RPGs and
mechanize storytelling, so that everyone has mechanical goals, mechanical methods to advance those goals, mechanical methods to make the story about them, mechanical hooks that let the GM or other players manipulate them, and so on.
Or, to put it another way: Most RPG players I've talked to, when you start talking about things like "flaws and perks" and social skills, tend to have a mild aversion to certain things, like... "Contacts" as a numerical stat, for example, because it turns storytelling into a mechanic you roll against. Games like FATE looked at that, and said "Here, hold my dwarven ale".
I mean, it's not really a "just happened 5 years ago" thing. Whitewolf was doing some of that ages ago. And I don't mind some of it in moderation - heck, I even kinda like FATE, at least the "full FATE" version that more or less stopped with Dresden Files, the "FATE Accelerated" fork is awful. But, oh... Probably just under 10 years ago, you started seeing a lot of people going
all in on that style of game. It was the new hotness. And a lot of the attitude seemed to have a lot of "the GM is, at best, a necessary evil" undertone too it. Like... "How DARE the GM think he's got more power or importance than the players, just because he's doing way more work? Fine! We'll take your jobs away and give them to the players!"