We have a refurb Credo 40 package with DF+ and 80LS for $9,990.
You should never judge a camera based on its release date or age. Some cameras are hopelessly behind at launch and some are ahead of their time by years. Judge them by actually trying them out and seeing how well they fit your needs.
If you don't need high ISO the refurb Credo 40 is one of the best deals going in medium format. Syncs at 1/1600, full suite of modern high quality lenses, fast and rock solid tethering, compatibility with and bespoke color profiles within Capture One.
USB3 is the go to option for tethering; it connects faster, transfers faster, and is easier to find computers for. FireWire 800 is still there, and does have the benefit of powering the back and therefore reducing the frequency of battery changes, but FireWire is slowly but surely fading away.