@inna There are many old time Audiogon members who no longer participate. And for good reasons. They all had great systems and amplification was never SS, and some of those people could afford anything.
Actually, one old time a’gon member did post a few minutes before you. His ref system happens to be SS amplified.
I am another A’gon old timer -- and my ref system amplification is SS.
This said, we may easily be exceptions to the rule...
I for one love tube gear as well --the CAT gear mentioned above are favourites-- and I have an old tube-based CAT pre (not in the system).
Regards