And the only reason FW was even used was because at the time it was the better connection method for transferring large amounts of data compared to USB.
When USB 2 was released and common, Apple switched to 30-pin and USB2, while still allowing those with FW adapters to continue using that medium.
You keep saying this but the first two generations were FireWire only and after that the 30-pin dock connector was used until Lightning came out.
And even then the classic iPod never used lightning, just stuck with the 30 pin
And the only reason FW was even used was because at the time it was the better connection method for transferring large amounts of data compared to USB.
When USB 2 was released and common, Apple switched to 30-pin and USB2, while still allowing those with FW adapters to continue using that medium.