Prof sorry but wrong, We have been playing with isolation devices for both electronics, and digital components for years and the difference is very audible.
All electronics are sensitive to vibration and that includes solid state as well as tubes. Of course Turntables are a greatly improved by isolation.
I used to do a demo of a $900 Rega Planet on a solid steel shelf, then with Black diamond footers, and then a black diamond shelf.
The black diamond shelf is a thick slab of carbon fiber with other high density plastics. and a set of carbon fiber footers.
I would demonstrate this cd player vs a $3000 Cd player booth on top of the same racks, then put the isolation components under the Rega once the CD player was fully isolated it crushed the performance of the more expensive cd player and once you took the cheaper player off of the base and then put the better player on top viola the more expensive player then wildly outperformed the cheaper one.
Think of mechanical jitter, this way in the days before electronic image statbilzation and you were trying to take a long aperture exposure with a telephoto lens the small shakes and vibrations would cause your exposure to be blurry.
A $20k professional camera hand held vs a $1k camera with the same lens setup but sitting on a tripod would take a much sharper picture, then the much more expensive camera.
All devices including transistors are microphonic, tube are more so, but transistors still have crystaline structures which can vibrate.
When you remove vibration the system focuses much better, the images are much more defined, bass is tighter. Huge improvements.
If you told me 10 years ago I would have a $14k Stillpoints rack I would say your are crazy. The difference putting high end electronics just amps on this rack were huge.
We recommend Isoacoustics cheap and very effective.
We are looking at several next generation racks as Stillpoints have gotten crazy expensive but you have to hear the differences in doing proper vibration isolation it takes a good system into the next generation.
Dave and Troy
Audio Doctor NJ