Agreed, TB2 is more than enough for 99% of DAW requirements - only Mac users running multiple retina displays via TB3 are pushing the interface limits, it’s not as if audio is suddenly going to increase in resolution 100 fold! I deliberately bought UAD on firewire at the time (even though thunderbolt was out) because firewire was the dependable/solid interface on Windows (I would have gone tb on Mac) I’m still running big mixes and not running out of bandwidth and firewire is way inferior to TB2.