For me, the two
E's (Emotions & Electrons) makes for a fascinating
Explanation. With the former, same day experiences matter - what kind of day one is having. Additionally, an experience one might have had seven days prior may help or hurt their ability to emotionally connect to the music in the here and now.
With the latter, electrons like an environment at rest. Wanna test that theory? Make your swaps, move your cables, bend your cables, rearrange your gear.. and put it all back like it was. It won't sound like it did or be at its best until time has a chance to settle things.
Or buy a new cable that has a factory burn-in recommendation of 100 hours. Excited, one cooks it on their solid-state gear 24/7 - smiling at day 5. And they note a change in sound signature. Well, depending on the cable's design and materials used, it's going to need a certain amount of time to settle, no matter how fast one arrived at the total hours of run-time recommended. So, one may see another change yet again, say 21 days after installment.
These are my views from my own experiences inside my listening room. Admittedly, while I have an open mind,
I'm also hungry. And may have a different view on a full belly.