]18gb vs. 1.5gb[/B], which would you choose if you were a dev in 2001? Regardless of what your game turned out to be, the fact that you had enough real estate to make whatever you wanted by having a max of 18gb disc in 2001 was enough reason not to go the GC route.
Btw, you can't really bring 'multi-disc' into this comparison, as developers had not really thought about going beyond 18gb prior to the 360 generation. I'm pretty damn positive that people were thinking more than 1.5gb, though.
Also, the fact that the PS2 played DVD movies was a big draw over the GC. And don't misunderstand me, I love the GC that is sitting in my office right now. I still think it has some pretty spectacular games on it (RE4 for example), but when it was launched it was already behind the PS2 because Nintendo ignored the technology trends.
I mean when you see the Dreamcast go down to the PS2 because of the lack of DVD (and I know there was more issues than that, but that was a big reason), why would you NOT put a true DVD drive that played movies in your system? DVD was just hitting its consumer strides by 2000, so people really wanted that ability in a system.