Before you turn a blind eye and believe power cables are snake oil, do your research and test for yourself and don’t fall in the trap of what other folks opinions about upgrading power cords. The reality is that some do help and others may not. It is system dependent. My advice to folks who are eager to learn is to speak with an electric engineer with your company that provides you with power to your home. If turning a blind eye is your thing and you believe that the gauge size or how the wire is designed doesn’t make a difference, then you won’t have a problem using 18, 20, or even 24 gauge wiring. How your equipment is built and what you use with it. will determine how it functions. Please see the video for example. If you have a tuner with a reception meter, you can try this yourself. I did.
https://youtu.be/DC0s6KqQz3g