For my Speaker Cables I use Cotton Thread to suspend them.
Does it improve them 'no comment' as I have not A/B compared them against the Coiled on the Floor option.
When I took the time to organise my Interconnect and Power Cables and neaten the way they are laid out, I recollect the Sonic having a perception that it was a little more transparent. The impression made was enough to keep me mindful of maintaining a Tidy Loom.