But that's the problem, there are too .any different kinds of fans for the Setting: TSR and WotC have spent over 3 decades splitting the FR fan base. I think they are pursuing an aggressive solution, which also risks somewhat of a split: we'll see how it hashes out.
So what I'm looking at from that passage specifically is:
"A mysterious group called the Weavers created the obelisks to undo great calamities - often hurling a region or an entire world back in time before the calamity occurred..."
"No one knows anything about the Weavers because the evil wizard Vecna stole the secrets of the obelisks and used them to erase the knowledge of the Weavers from existence."
The most obvious mea ing of this text to.me is that Vecna hijacked the time travel Obelisks (which as we know from Icewind Dale, still work), and went backwards in time and committed cosmic genocide against tje Weavers so that they wouldn't be a threat to him or ever learn what knowledge he gained from them. Hence, the D&D world as it exists as of the Ahaytered Obelisk is the result of Verna manipulating the timelime for.hisnown purposes. Which I have zero doubt we shall hear more of soon.
It brings to my mind the events of the Last Great Time War in Doctor Who, which set up the soft reboot of modern Doctor Who: