I think that there are two things throwing people off. One is that your components sound different after long periods of use and secondly that thinner power cables provide superior sound. Many of us leave our components on 24/7 due to changes in reproduction after our systems are turned on, but the end result isn’t a reduction in fidelity. If this is a power supply issue where noise is getting back into the system and in a different manner after many hours of use, then speaking with a technical person at Shunyata might be useful. I believe that Shunyata started out trying to provide less noise to sensitive equipment in hospital environments. Richard Rodgers at Shunyata would be the guy to talk to. Their focus has been reducing bleed back noise into an electrical system via their NR power cords. If you have trouble getting through to Richard, message me and I’ll provide his mobile number. I try doing this sparingly.
BTW…. There are a subset of members here that believe that spending large sums of money on power cables is a waste of money and that cable make little, or no difference in component performance. I don’t believe that most post to criticize the rest of us, but rather are trying, in their view, to save us from wasting our money.