I understand his specs. I also don't disagree, in principle, with the idea that -90dB of PSRR is a desirable thing, and indeed I add LCR filtering to my SMPS units to drive a phono stage which are simulated/measured to achieve that performance and higher as the gain in the stage is very high- c. 4000 and the output SINAD has to be better than 75dB weighted with power supply artifacts included.
To illustrate this, at a closed loop gain of 100 an AD797 or OPA1612 only has, if my memory serves me well, about 40dB of PSRR at 20kHz and a signal level of c. 25mv for a MC cartridge, so for a PSU with say c. 2mv of noise you would like 30dB or more of extra supply rejection to be safe.
I use damped LC filters to achieve this.
However, the opamps cited all have similar PSRR rejection figures, so this is hardly a blind comparison.