A: People who want expandability.
A: Since you got the answer to first question wrong, you missed the part where people want expandability. Some people need a lot drives for their music or videos, but don't need the multitask which means 3GB is enough.
Q: Who needs expandability?
A: Pros
Q: What do Pros want to expand?
A: Ram
If you want more than 1tb for music and movies and don't do anything else with them you got yourself the wrong machine
For those who you described an Imac with a couple of Tb external disks via firewire should be better and WAY, WAY cheaper
I could understand your point if the Gpu was free. But it's not, and it is always late, difficult to buy and doublepriced
By the way, gpu being apple locked is ridiculous as well imo....