Usb 3.0 device has more bandwidth then firewire 800 yet firewire costs twice as much. what kind of stupid is that. why would i pay twice as much for a firewire drive when i can buy a usb 3.0 drive for half. who prices this crap
First off, USB 3 is new, FW800 is a current but soon to be fading technology. Those who need it will still pay for it as its a substantially superior to USB 2, which is its direct alternative, not USB 3. I use FW800 for my external drives connected to my media server. It'd be unbearable to operate them at USB 2 speeds. And it will be some years until I replace my 2009 mac mini with a computer that has USB 3. Not to mention all those FW enclosures.
Second, its more than just speed that makes an interface more expensive than another. Licensing and manufacturing complexity play big roles. I have 4 external drive enclosures daisy chained off the mini's one FW800 port. And I'm about to add a fifth to the chain. No hubs needed. Try that with USB. And I get solid I/O to all the drives in the chain simultaneously.
In the same way Thunderbolt, which is actually Firewire's direct successor, will most likely continue to be more expensive than USB 3 due to its more complex design. But that more complex design will also continue to have power and data handling capabilities that remain superior to USB.
USB and FW/TB have inherently different intentions. USB was designed to be an inexpensive, all purpose peripheral interface. The compromise is that lower speed peripherals can degrade higher speed peripherals on the same bus. And USB is reliant on the already busy host CPU which can impede USB performance.
FW/TB was intended to eliminate that compromise for high performance peripherals such as mass storage devices, and now with TB, monitors and graphic CPUs. Its peer to peer operation, eliminates the reliance on the host CPU, to help ensure consistant throughput at all times. That comes with a higher price to produce a much more complex controller circuitry.
----------
From a consumer standpoint, a general rule of economics applies, if you don't know why you would pay more for it you probably don't have a need for it.