Cable interaction is for sure real ,
Thats why cables off floor electricity,magnetic fields,
No Ac cable Ever on any interconnect,or speaker cable
And if AC cable are near each other alway run at a X
Across and i keep separate with speaker foam so thsy never touch
Having owned a Audio store my techs taught me many
Things regarding magnetic fields,and noise it can be measured and heard
Also depending on your cables quality in shielding.