I wanna flip your question the other way around. Im running 2xP12 regenerators. One for each monoblock (JC1+) whereas the rest of the system is divided equally between the two regenerators. All I can say is that my system benefit from these regenerators very well. Both dynamics and blackness is added compared to running them directly in to wall outlet. What is a regenerator a P12 then? Its stored energy in its heavy caps and coils also making a more clean sinus wave. Bare in mind I live in country using 230 voltage and Im truly sure this also has advantages du to lower current of the components vs 120V. Only downside I would say is the fans of the P12, they are not noisy at all but their still there and can be audioble when everything else is dead quiet. I would say my P12´s are running totally 35-40% capacity at medium to high volume.
Im not answearing the topic as Im still running regenerated power and having no plans of otherwise, but Im trying to enlighten why Im using these as someone might find it interesting....