PS2 - Real info request.

[Mirage]

The amount of HDD space they can use is allocated by Sony. Considering how good friends SE and Sony are, they could probably get the storage limit increased.

The amount of available RAM is the limitation what's showing the most.

While this would be speculation, I also think that the PS2 limitations also consume a fai amount of man hours during the development process. I can't imagine it being as easy to add new features to a console with 99.999% of its RAM already used up, as it would be to add new features to a system that has several hundred MB free RAM (Practically every PC running the game, as well as the XB360).