I suppose it's up to the individual user to determine if potential sympathetic vibrations from flooring are advantageous in a given environment or not.

It is amazing to me that some people are marketing spikes as a means to isolate vibration. Spikes change the way a loudspeaker's cabinet is physically coupled to a stand or to the floor. This may cause the cabinet to vibrate less by giving the kinetic energy a partial "drain" thereby changing the way a loudspeaker sounds, but the energy that is drained away from the cabinet has to go somewhere. From a physics point of view, spikes are an effective means to transfer some of the kinetic energy from one object to another.