It records onto tape, yes?
The thing is that tape is dying in all but the very high end, where Sony dominate with HDCAM(SR) et. al. I do think that Steve's two year time period is a bit off. Its closer to 12-18 months at best.
The thing with firewire, which was always nice was the higher sustained data rate than USB. This was essential as the transfer from tape was real-time, where the image is re-recorded to the HDD. Now we are seeing a move to file-based acquisition, the sustained speed capability is not necessary to ensure that a high quality copy exists on the computer.
I certainly can see why people are upset - I was in the miniDV/FW400 world for a long time, but file based systems, providing you buy from someone that uses a well understood codec are so much better. Yes, the speed increase you see is always welcome, but it isn't taking that much away. Anyway those who have 18 month old cameras aren't likely to buy their first editing platform now. If they really do need FW, buy the old, white Macbook. It could cope with MiniDV fine last week, and nothing's changed.