Well, you listed it as a 'driver issue'. It's not - it's not needed because no hardware exists for it. It could be easily added, as I said, in 1-2 days maximum, if suitable hardware required ADFS to use it. Given a bus that supports transfers aiming anywhere near 33Mb/sec, and of course it would be an issue. NB Omega and RiscStation use their flavours of IDEFS, which are much more advanced than ADFS in many ways.
My point is that although it's touted as such, it's not really a 'great leap', it's more a minor tweak to adapt to the hardware. The podules don't need to - because their transfer rate bandwidth is 6Mb/sec, and maximum possible given the constraints of Filecore's efficiency is around 3-4Mb/sec.
The 'great leap' is actually having hardware that /needs/ it .