Do people really think super systems are always the best that can be had? I don't think they do. I think almost all people here are much more grounded in reality than Oscar Wilde's cynic who "knows the price of everything and the value of nothing".
At shows I have heard super systems that sound very good on source recordings I can trust. Also others that seem to be tied to sounding impressive with particular types of demo music but which I could not evaluate due to the absence of broader, familiar recordings. And there have been others that did not engage me at all leaving me to wonder whether I was missing some point about them that other listeners got.
Then there have been many much-less-super systems that have engaged me very well. There seems to be no obvious correlation between price and value beyond some point. Just super system
price anchoring IMHO to try and nudge up the value judgement of as many people as possible.
Ultimately over the past few years I have always returned home from a show, listened to some music on my own not-super system and thought "aah ... that's how it should be".
As per
@exliontamer above I am sure there's an element of being used to my own system. Just as I have found that the first good recording of a piece of classical music can instantly become my favourite version. That initial impression does take time to evolve. However, over the past six-plus years I have heard super systems that might be a rival to what I have, but much more expensive and IMHO not necessarily better in my context.