Vibration Control

Edison got in just at the right time for supplying his High End Audio Replay device.

Mechanised anything was in very little use, so only natural influences to be concerned about.

The Seismographs activity showed substantial changes to their readings during Covid Lock Down Periods, that was the dream period in the last 70 years for the use of Audio Equipment, in relation to ambient energies impacting detrimentally on the end sound.     , 

@OP "Solid State" devices are full of moving parts - capacitors and transformers in particular. But in any event just because something is solid doesn't mean it doesn't resonate.

Hearsay belief not scientifically validated. 

Your head and particularly your teeth vibrate. Why not wear wrestler's protective headgear and plastic mouthpiece? Wouldn't you then hear more minute musical details?

Funny, there must be something to this. I have anti vibration control under a dozen pieces of equipment, except for my SS amp and SS preamp. And I never over thought it.