Ehhh who hit you with the stupid stick? I've lost count of how many tube amps I've designed so I'm well aware what tubes can and indeed can't do. Nothing to do with my amps either, some of my customers have Lampi dac's which is why I know they are such utter shit.
Now, since you know so much about tubes...are tubes less noisy than transistors? Are they better at amplifying low level signal than transistors? Are they superior in terms of distortion and other artifacts that deviate from the original signal? Nope, fuck no and hell no respectively. What you fail to grasp is how tubes are used and where they work the best. That sure as shit isn't a tube output stage of a DAC which is ironically fed by a current output dac. Also since you bring up the T2, I'm well aware of it and I'm even revising the circuit boards now to hopefully increase its performance so let's dwell on it for a bit. Is the T2 the best amp there is for electrostatics...nope, it isn't. Would it be better if you replaced the front end tubes with fets and the output tubes with SiCfets? Yup...by quite a bit actually. That has nothing to do with "tube magic" or other such BS claims based on not having the slightest grasp of what is going on. The fet's are simply better devices, made to much stricter quality standards.
What tubes do well is simple circuits, even silly simple sometimes and they are forgiving of "designers" who don't know what they are doing. It's hard to blow up a tube...though some people have tried their best to do so. Ohhh and they were excellent for HV output duty but the SiC fets are clearly better.
As for these super qualities which are now just coming to light...is there anything to back up those claims or just your own BS? I take it the GG is still using a Soekris dac fed by an off the shelf PSU from ebay and another ebay special USB input. Well shit...I have all those parts...hell even two Soekris boards so I should throw something together and charge somebody 40K$ for it. I have some DHT's too so let's make it super exclusive and throw a tube output stage that does fuckall but looks super cool...ohh and fuckups the sound for good measure.