@panzrwagn "Maybe you could define of what a sufficient system is made."
@coralking "One where you can hear the differences between cables."
Interesting question and points. A musician family buddy, also a very capable audiophile and I traded and listened to a substantial collection of interconnect and speaker cables on three different systems years back. It was a valuable exercise to check ourselves, the systems, our hearing, and beliefs about different cables.
On system A, we noted cables changes and the differences were very evident. On system B, a bit harder to discern notable differences yet still there to a smaller degree. On system C, a lower level quality system was much more difficult to discern differences to justify any of the higher $ sets of cables. Afterwards, moved cables from system C, back to system A, and quickly realized differences again.
A time consuming and expensive journey for sure to buy & try different cable setups if you don’t have a loaner program or friends to trade with to try different setups and combinations.