ive heard alot and owned quite a few ss amps. even the new tonemasters that ive played in the store do not sound as good. they have a good tone but the stale/dull sound is still there. maybe some people dont notice or cant hear it but i can.Although I agree a tube amp does not have to be "cranked" to sound good, I don't agree with the rest of your statement. Maybe you haven't heard an SS amp sound as good, but I believe I certainly have . To add to that, I NEVER play a stereo amp.... so I certainly don't need one to "come close".
kinda like my wife when the "true motion is on", on the tv. i say "it makes it look like a soap opera" and she says "what are you talking about". for the life of me i cant figure out why she cant tell a difference.