My thinking is the same as a few others here: Everything depends upon your budget and balancing the quality of various components and cables. A $2,000 cable might sound better than a cheaper cable (one would hope!), but it makes no sense to use it in a system that is $10,000 max. You get more bang-for-buck balancing money spent on each part of your system than maxing out on any one thing.
And then there is your listening room — mine is definitely not ideal but it is what I have and I’m not moving. I will likely look into getting dedicated ac lines from the breaker box to my listening room, and room treatments at some point, but I’m sure the benefit will be limited by the room and my budget for equipment. I make my peace with that — I have to. I have too many other things to spend money on to blow the load on a sound system. Others don’t have such limitations. Good for them.