Parmandur
Book-Friend, he/him
In the history of D&D publishing, the Forgotten Realms rising to the top is more a matter of natural selection in the wake of TSR throwing everything against the wall to see what stuck in the 90's: the FR is what stuck. Not an intentional design, because TSR tried everything. Perkins, in the interview already linked goes into why FR products work for homebrewers, and by extension standard play at most tables.Considering every annual adventure published is for FR, this isn't exactly a surprise.