I used to think pricey interconnects were snake oil...

The more I read of some of the things people believe the more I'm convinced that audiophilia is tantamount to religion. You can't prove things with facts or objectivity so you have to have faith. "I know what I hear." 😐

Ear sensitivity, critical listening focus and perception, personal sonic preferences, etc all add up to a sound system add, say a new interconnect, being an upgrade to one person, a downgrade to another person and not discerned at all by yet another person. This is why for this discussion there are interconnects at almost all price points that will sound good or great to one person and potentially horrible to another person. Trust your own ears because the listening experience in your listening space should primarily only be for you, not what someone tells you you should like. Also, whether naysayers like jasonborne or kenjit want to believe it or not, every single element within a sound system impact the sonics in some way whether it’s very subtle or glaring.

Cables make a difference, and you can tweak the sound with different cables like tube rolling to some extent, depending how resolving your system is. But in my experience equipment and speakers come first; must get that right first.

Achieving “different” sound quality with cabling is certainly possible. 
 

Achieving “better” sound quality is in the ear of the listener. 
 

I often chuckle when I read of one component killing another. And making a purchase recommendation as a result. One can spend a lot or a little to make their system sound different than it did before. Whether it’s better or not remains purely a matter of perception and bias. 
 

In my humble opinion. 

Anyone needing a rationale for experimenting with new cables in their system and/or feeling dissuaded by the Church of Denyin'tology's antiquated electrical doctrines: take heart!

        Many new electrical facts have been established in the past 100 years, that support audible differences, between various cables, etc.

         I couldn't find anything like, "Updated Electrical Theory For Idiots", but- did manage to find something resembling a cartoon, that even a child could follow.  It neither mentions AC/sinusoidal waves in wires, nor does it go into the photon propagation of electromagnetic waves.   It does, however, emphasize/demonstrate how Electrical Theory has progressed, since the 1800s:

              (https://www.youtube.com/watch?v=KGJqykotjog)

        These next few presuppose a certain amount of knowledge, in the field of modern Electrical Theory.    Click, "more" in the first link's first answer, to get it's entirety.    Note how it mentions the OLD, "... commonly held misconception that the flow of electricity through a wire resembles a tube filled with ping pong balls...", to which the Denyin'tologists fervently adhere: 

https://www.quora.com/Are-photons-involved-in-all-forms-of-electricity-for-example-when-it-flows-through-wires?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa

                                            and:

        https://van.physics.illinois.edu/qa/listing.php?id=2348

        It's an established (measured) fact that an electromagnetic wave's propagation and speed, are dependent on the materials, of which the transmission line (cable) are made (ie: Dielectric Constant/permittivity).     The better (lower) the Dielectric Constant the better the flow and the longer it takes for that material, to become polarized.     One reason anything that comprises an RLC circuit (ie: capacitors, cables, PC boards), takes time to, "form", or, "break/burn-in".*      

          *Something that makes the Denyin'tologists apoplectic.

   https://resources.pcb.cadence.com/blog/2019-dielectric-constant-of-pcb-substrate-materials-and-signa....

https://unlcms.unl.edu/cas/physics/tsymbal/teaching/EM-914/section5-Guided_Waves.pdf

          Even the most inane (regarding the Sciences) must admit; braiding and twisting wires eliminates/reduces EMI interference.              
          That must lend credence to various cable geometries.

          That better dielectrics enhance the propagation of electromagnetic waves (ie: your music signal), lends the same credence to choosing cables with better materials (ie: Polypropylene, Teflon, air, etc).

           Of course: anything the Church of Denyin'tology's popes can't fathom, they'll summarily dismiss.