I hope this doesn't sound terribly silly, but why would it be especially well suited for digital? The shunt mosfet's impedance is going to be hard to keep low in the higher frequencies because of the gate capacitance requiring more drive than the mirror can provide. Looks great for the audio band though. I'd expect a BJT or cascode to work a bit better for high frequencies but can't get it to sim right.

It does not matter what the shunt does at higher frequencies (whether it is still active as in having a low resistance) because noise on the digital chips isn't determined by the shunts ability to 'shunt' those frequencies, but is solely determined by proper decoupling as close as possible to the chip(s) in question.
It is physically too far away from it anyway as the PCB traces have too much inductance for a low impedance power supply to be of help.
Certainly when that shunt PCB is connected with a few cm of wires 
The noise in the HF range can cause problems with complying to (common mode) emission regulations and/or have other strange interference effects.
Layout and PROPER decoupling are paramount here.

Low noise in the 'audible range' and above is what some claim that counts as it is these lower frequencies that 'modulate' the clock and PS lines of the associated chips (think H-L transition points and references) is what causes the sound to 'degrade'.

It should be noted that from a technical point of view it is hard to prove the claims of the audibility of it but that's another matter entirely which I won't go into because I may be commandeered to     

In any case, a good low noise power supply never hurt any circuit and if it brings something good to peoples ears (not necessarily mine) I am all for it.

One of the DAC's I installed this PS in was my 'FrankenDAC' (BIII, PH shunts, Amanero, reclocker, clock board, discrete low noise power for clocks & output flip flops, XO Caps, etc.). Sabre chips have always revealed the detail in music, but getting rid of the 'edge' or digitalis has been a continual effort with FrankenDAC. This PS - one feeding the DAC and another feeding the clocks has the 9018 sounding more like an AK chip then ever.

I'm just re-reading this posting. And I'm actually finally noticing the ES9023 "edge" or glare. I guess different headphones can reveal it better than others. I've recently upgraded to Alpha Primes and I'm definitely noticing it now. I'm not sure which is to blame. I'd say both.

I used AMB's Sigma 25 power supplies in my Curryman ES9023. While they're not the best option out there, they were the smallest / best I could do at the time. I'll probably drop in a Salas Reflektor D to see if there is a difference. Otherwise, these are going into the above project I mentioned.

You think 3 Reflektor Ds are required? I guess if it makes the difference then it's worth it. I can see doing 2 supplies. One for DAC/Reclocker and other for Clocks. But like you said you wanted to push it to the max.

For my next 9023 project (mid to late 2015) I'm going for the Beagle Bone Black as input source. Like you I have a pile accumulating of unused parts. Mostly Acko's stuff. I'm hoping Acko will finish his Cape board by then. I'm still trying to figure out if it's even possible to use something like the OTTO II and switch between Amanero and BBB. Not sure if the isolation/reclocking will work after that. I'm definitely going to want as many Reflektors in action. As mentioned, the plan is to use a Wire SE-SE with its associated power board. I'll use the same PSU for the JG Filter. I think it's going to be a cool project. Then we can talk about AK DACs

So the SSLV1.1 isn't the right supply for digital then? I have two of those boards sitting around... waiting for the right project. I was thinking for a future NTD1...