Zardnaar
Legend
Are you including all of the spells the classes have access to in BECMI? Make an accurate comparison Zardnaar; include the descriptions of the spells and abilities the classes had access to in the page count and watch it balloon.
The spells are not tied to the classes as such though. Well maybe in BECMI. But a new class using spells is tied to the same mechanics though so a new spell caster in say 3.5 like the Beguiler uses the same spells in the PHB as the other spell casters. A new martial class in AD&D for example Barbarian fits on a few pages 2-3. The spells are independent of the classes and have been since 2E at least where you could make hundred of classes using the PHB spells.
That is what 4E needed IMHO was unified powers lists perhaps tied to power sources with the differences between a striker or whatever in the classes.