Thanks nice writeup .
The obvious follow up question what about LC or LCL or LCLC type of linear supplies
I reckon they are(where) common in Tube gear of old ( And the LC type is in industrial VSD drives with sometimes some LCL filter at the input too )
Nowadays when building power amps a normal linear supply as you described is deemed "good enough" even in expensive amps and any upgrade is usually a switchmode supply like in the AHB2 ?
Not seen anyone going to the extra trouble off adding heavy and large filter inductors in linear power supplies in a long time.
The cynic in me tells that its not an understood and marketable feature , moare microfarads is