I never said it couldn't. What I stated was USB is better for keyboard and mouse. Apple has never made a firewire keyboard or mouse.
It a matter cost. USB has always been cheaper and easier to make.
Minus the sustain data transfer rate and the fact a little more power can be put though a firewire cable. Every where it takes a back seat to USB 2.0. That is the reason firewire never took off. It applications are just to limited on where it is a better choice.
USB has always been smaller and cheaper than firewire.
Yes USB 2.0 is over kill for a keyboard and mouse but the cost difference between a 2.0 port and a 1.1 port is very little any any at all. For almost everyone out their USB is better choice
All completely correct. Hence the U in USB. Firewire is a much smaller niche than USB (which is kind of like the old ADB). However, given the choice, I would much rather have FW800 or even FW400 for my HD camera and hard drive than USB2.0.