I'm A Banana
Potassium-Rich
I wonder then... Why does the topic of "everything is core" come up in threads that discuss 4e book bloat or crunch saturation. It's not that everyone has to buy everything to enjoy the game.
Well, 4e is supporting a lot more classes and races and stuff going forward than 3e did. Bloat may be in the eye of the beholder, but there are a lot of concepts that I need at least be passingly familiar with, as a DM, if I want to fullfill my players' expectations of playing anything that's "core." More so than in 3e, where I could add them on a case-by-case basis, here, they're assumed.
I don't think 4e really does have any kind of crunch saturation, but certainly more stuff in the core adds to that perception.