I have to go look to see if he still sells cable lifts and what problems they solve.
I'm sure he does, after all: "Pure metals love to ring. They do so sideways and also along their lengths..." I'll keep the source of this quiet as it's already well covered in another thread... but it's actual ad copy used in a loudspeaker ad.
It would only stand to reason that using lifts would help keep this from happening, since if ringing wires in a speaker cabinet are a problem - the ones lying on the ground should be even more "endangered".
EDIT: Also of note is this photo... which clearly shows the advantages to using them on your power cords as well as on your speaker cables.