Loved the technical detail; described as "the boring bits". I imagine all there listening did too.
A lot came to mind during it. But I will voice only one I think pertinent to the tenet of this site.
It was describes that particular if not better to say extreme care was given to the cumulative noise every cap, resistor, device, board, lead/trace, et al would add to the whole. I think it would be very interesting to remeasure an amp that gets normal but frequent use over time. To see after 5 then 10 then 20 or whatever years, whether degradation occurs to any of the selected precision components, and degrades the original super low noise floor or possibly THD/IMD. Meaning, we know components degrade. But traditional amps start at such a much lower value of SINAD, the degradation of components likely doesnt lower SINAD by much. But with this amp starting at such an incredibly low SINAD relying on super high precision and matching, I posit degradation of components from normal use could/might be more apt to affect the SINAD to the negative.
Just a supposition. But it could be interesting to put remeasuring this amp on the calendar periodically every 5 years.