[thormagni]

And especially in 3.0 and 3.5, where you have a really insidious case of "crunch creep." You start off with a few core classes and a few prestige classes and five years later, you have something like 50+ core classes and 150+ prestige classes. And who knows how many feats there are spread out amongst all the books. A thousand, maybe?

You could feasibly make an entire campaign with a single copy of the Hero Games or BESM core book.