And just because an amp uses tubes, doesn’t make it good. And just because an am is pure solid state doesn’t make it good.
To me the purest form of amplification "so far" to date with least colourations, lowest distortions, unrestricted dynamics, unrestricted current ability even into very low impedances, and for hard to drive speakers
Is high biased Class-A push pull direct coupled solid state amplifier, using complimentary bi-polar output devices with appropriate power supply/s and input/driver stage.
Guess what some of them are? Gryphon, Classic/Krells, Dan/Agostino, some Mark Levinsons etc etc etc.
Unfortunately, these are heavy, costly, and expensive to run.
Many say Class-D is there, I say no not yet, unlike the few here will like to have you believe.
And many others say also myself there are problems with it in the upper mids/highs.
Also it definitely can’t compete with the above into hard low impedance loads of many of speakers, no matter how many watts they have.
Cheers George