I think they kind of have. There is no fully realized setting, because I wont grant them Eberron. They want something less defined, more free form, and they dont want to be tied down.
Over the last few weeks I've been hilariously busy, and increasingly frustrated at the discourse here (not with you) and people continuing to appeal to or refer to old editions as if they are relevant today, in the year of our lord 2023.
It really isnt anymore. "Oh you have your old 2e lore in old books." Who cares? 5e is going to be 10 years old. It is the defacto definition of D&D for the largest 'generation' of gamers, and is unless WotC throws a massive curve ball next year, pretty much going to be exactly what it is in a post Tashas world. "Oh it was like this in 1e." "Oh 4e fixed everything and is gods gift." It just doesnt matter.
5e is shaping up to be evergreen, and is going to be the definition of D&D, for a TON of people, for decades.