I've been catching up on some old items and I finally got around to reading the series of Dungeon magazines that included the "Scales of War" adventure path.
What stood out to me was how much it shook up the status quo of the planar lore. This included things like:
Gith escaping from Baator and possibly reuniting the githyanki and githzerai
The pact between the githyanki and the red dragons being dissolved
A revolution in the City of Brass
and the death of Tiamat!
This surprised me as it shook up the status quo more than anything I can think of short of the "Faction War"
And while I know that everyone's campaign is different; my question is "How much of the 'Scales of War' was embraced as standard/default canon?" I haven't come across much of these changes before; but I may have missed things