Hey Morricab,
Me? I'm not really one for Platonic idealism.
As you well know, audio engineering is part science, part art and part luck. You do what you can within your control and the rest is up to the gods (i.e. talent).
And yes, the reality is there are plenty of mic pres that would only ever be used in a studio of mine as doorstops, but not all of them would be solid state. It’s like anything - there’s good and bad examples of everything, not limited to mic pres and phono pres, but some things have moved on since the 70’s (thankfully). Like artisanal and specialist hi-fi, there’s literally hundreds of small manufacturers producing mic pres in all sorts of flavours, so while you can make some broad generalisations, that’s all they really are. The whole point of choosing a mic pre is usually to achieve a very specific sonic goal, of which the match with mic is always decided in consideration with the source being miked.
Were I to build a studio from scratch again there’d be mic pres based around the Telefunken EF804s loaded with Lundahls for 70dB of clean gain; Neve 1073-style Class A with 1% metal film resistors and Vishay potentiometers; pres featuring switchable steel, nickel and discrete output transformers; and pres based around a balanced push-pull double triode circuit - all different, all for different applications, all with different sonic signatures for matching with different mics. As a non-purist, I appreciate variety, much like I do bikes made from steel, titanium and carbon, and wines made in Burgandy and Alsace. I like Coltrane and Sun Ra and The Mars Volta and Messiaen. Heck, I like digital and vinyl and even have a soft spot for cassette.
But even if I did assemble the above mic pres for my idealised studio, they still wouldn’t make up for improper mic selection or placement and none of them could possibly make up for an inferior ill-prepared instrument. Choosing those things is partly the responsibility of the engineer - no technology, no matter how sophisticated can make up for the dork setting them up wrong. And when it comes to who the musician is and how they play and make music, well, nothing makes up for that.
Best,
853guy
P.S. I'm guessing, but I imagine the two engineers who wrote the paper went on to have careers in which they were endlessly infuriated that lesser engineers using overloaded op-amp based pres still made massive records with talent who cared much less about the sonics, and much more about the song craft and performances. Just sayin'.