Does it make sense to still use firewire?

I have firewire in production still and you can usually get excellent performance / $ by buying older technology.

• The latency of FireWire is excellent - on par with Thunderbolt
• The bandwidth of firewire is nearly that of gigabit ethernet and way faster than any source or destination of data that you will send on that era hardware.
• The reliability of FireWire is excellent

Why spend more for a connection that won't limit your speeds and is very easy on the wallet and reliable? I say go for it unless you really want to spend more on the card and cables or could use gigabit ethernet instead.