Why are people so still concerned about USB's CPU load? Also, SATA comes in 6 Gbps flavor now.
I haven't used usb 3 with hard drives so it might have gotten better, but any cpu processing of data is unnecessary and would slow down rendering etc, and it was significant on usb 2, and it actually made my drives sound like crap while reading and writing compared to the smooth sounds of reading/writing over firewire or esata. can't be good for the drives.
True, forgot about the sata moving up to 6 gb/s, esata probably has too but still not good enough for raid.
usb 3 may be good performance for a good price, but it's still not the way if your time is priceless. I doubt any pro video editors/photographers or anyone else who deals with lots of data think usb 3 or esata is > thunderbolt, so it's just that it costs which may not be worth it for some, but priceless to others, and is clearly the "best" right now not factoring in $$