In all seriousness, the only way to tell is to experiment.
Various objects be they wood, plastic, metal, glass, granite, etc.. (glass is the worst as it would resonate at audible frequencies) will have some inherent resonant frequency. What we are trying to achieve here is for the object to absorb the vibrations caused by air pressure waves away from our playback system that are causing the gear to get excited.
Cheap stamped metal chassis plates will resonate at audible frequencies. Obviously the same frequencies we are trying to enjoy are causing the gear to vibrate at the same time. A chassis made of solid chunk of aluminum or other material that has been machined like some of the more expensive gear will not resonate at audible frequencies, hence will not add its own chassis resonance to the equation. Hence much less need for isolation platforms.
The key for any footer or platform is to absorb and shift the resonance away from the gear. So the solid state devices are not experiencing vibration. How that affects the sound is left to the interpreter, their ears and perhaps even imagination...
With tube gear it is much more clear cut. Tubes can and do add their sonic signature from vibrations, “microphonic”. Analog sources, that’s obvious. Solid state is not so clear...