The majority seems to agree that there is too much D&D in Dungeon World. For example, having attributes like Strength between 3 and 18 mostly adds complexity but little benefit. So everybody likes to hack Dungeon World: Chasing Adventure, Stonetop, World of Dungeons, Fellowship 2e, Homebrew World, …
Is any of those getting popular so we could have a modern „default Fantasy PbtA“?
My favorit is Mixed Adventures which I made myself (mixes aspects of other hacks).
If I was to choose besides my own, i would say Homebrew World which is the the one that has least rules.