TwoSix
Everyone's literal second-favorite poster
You should browse around the Paizo boards sometime, you'll see a very different consensus in terms of expectations of what should be allowed for character building.Going to have to disagree with this.
The amount of product has never had anything to do with this. Anything outside of the core three has always deemed as optional. What changed this was 4th edition because they made it clear that everything they came out with during 4th edition was considered core.
4e was different in that most games defaulted to using the character builder, which included every relevant source material by default.