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Pedantic Grognard
Advancing the timeline is the only way you can imagine to add things to a game setting? Really?So... continue producing material but never add anything?
A majority of the surface of Toril has never been the subject of any game product, beyond a marking of continental outlines. Most of the surfcae actually covered by a game product has never had more than a cursory high-level overview. And the number of places that have gotten as much detail as Shadowdale? Only Shadowdale itself.
Eberron was far more closely built around 3.5 D&D than the Realms were ever "shackled" to any given edition.And what about settings like FR that shackled itself to the game mechanics of a given edition?