I tried two different brands of lifters borrowed from friends years ago and they seem to have zero effect on the sound of my system.Cable lifters reduce the coupling capacity, which takes place via the floor. If you lift the cable, the gain is instant, and capacitive coupling is reduced. This can be measured. See hifi today (written in German)
In addition, speakers move a lot of air and cause vibrations. Nobody wants a vibrating speaker cord on the amplifier.
For these reasons, cable lifters are essential hi-fi accessories for me.
If cables vibrate because of the speaker output, wouldn’t they vibrate more if they’re hanging in the air near the speaker and not supported low on the ground?
I also wonder about the cable being supported on points and then hanging in free air in sections.
Some may think that they look cool. I also understand that it does send a message to sort of keep away and not step on the cables. That sounds like a very practical reason and makes some sense to me. Also for the purpose of separating the cables from each other seems like a practical function.