Anyone has a reference system where amplification is SS ?

OP writes:

(A) There are preferences and subjective elements and there is also objectivity

(B) Why would you go with those SSs instead of tubes, practical considerations aside ? They would never give you the midrange that those valve amplifiers would?

I'm not sure whats being argued here in (A) with the reference to objectivity. The fallacious argument from authority statement in (B) appears to be implying that this completely subjective statement is objective. But perhaps I'm misinterpreting.

Anyway, the term reference in a hi fi context is meaningless. It would appear from the post above that the OP sees "reference" as the best available. If that is the case then there are legions of solid state amplifiers which qualify including Pass XS, MBL, Constellation etc, etc. The "why would anyone go with those SSs instead of tubes? conjures up the old Monty Python "what have the Romans ever done for us?" sketch - power output, dynamic range, S/N level, damping factor - and consistency where the sound doesn't change when you replace the output devices, are a few things that come to mind.

A Reference or of the highest standards ,many of us cannot afford.

you build your Reference Audio system as to the highest your budget will allow .

the speakers by far are usually the most expensive , I see the front end Dac on par as importance for this s where all music starts and it’s signal purity,

once compromised it cannot be made up for down stream ,,

andyes all cables especially digital can make a big difference in resolution .

you need 2 Quality Ethernet cables as well as usb , then a Quality Ethernet hub with a LPS power supply ,also your router very important if streaming 

linear Tube Technologies  excellent LPS for $700 betters anything even at $1k and up to 8 amp, this LPS can be ordered up to 19-20 volts 8 amps and needed on the router ,all new ones are normally 12v around 4 amp, same with power cords , and system cables look for connectors Copper ,NotBrass  ,3x better conductor Thst much less resistance sounds much better.

Who’s gonna tell Harley that his system is not reference quality as per this OP …

No doubt "Inna"-Gadda-Da-Vida will ....

OP listen to this demos and tell what you this think