But did you add FW800 to your existing Macs when it came out or did you wait until your normal upgrade path finally led to FW800-equipped Macs? If the latter is true, there is no difference to TB and FW800 or any other interface technology for that matter.the only real downside I can see to this whole TB thing is their statement on needing a whole new computer/mobo. The fact that you can't even somehow retroactively add a TB connection (even at a slower speed) to existing hardware is going to mean that TB probably won't be in my house for another 2-4 years. We have very new macs and they aren't being replaced anytime soon.
So, you will keep buying non-TB harddrives until the day your new Mac with TB arrives, from which day on you will be kicking yourself for not having bought TB peripherals? (I do not mean not to wait a year or so for prices to come down, that makes perfectly sense.)And that begs the question: am I going to pay more for peripherals that support TB in the mean time? Nope. In reality if all I can use are USB and FW800 that's where my money will go.
And that probably explains everything, of course, if you are fine with USB 2 vs. FW800, the benefits of faster connections (and daisy-chaining), FW800 being about twice as fast as USB 2, are not important enough for you to spend too much thought, or even worse, money on it.However, I think it could be a slow process for a lot of people like me who are perfectly satisfied with USB 2.0.
Likely, the key difference between people that care about interface speed and those that do not, is whether you use external storage only for backups or whether you actually work with data on external storage.