imo to call it a myth is a little strong ... lots of people with nice hifi’s don’t sit there for hours listening intently, some want the excitement of live music, listen for a while, get their thrill, turn it off
we need to be careful not to impose our own usage behaviors and patterns, think all folks do as we do - pleasure from a hifi comes in many forms, usage occasions, situations
not to mention people hear differently, some clearly more preferring or more sensitive to some forms of distortion/tonality than others
'Myth' isn't strong. It might not be strong enough! All I'm saying' all I've been saying is there is literally no way to design a speaker or anything electronic to favor a certain genre. If that were possible the market would look a lot different. Anytime there is a coloration present it will affect all genres equally for a simple reason: musicians all use the same bandwidth; all forms of music have the same use of lows, mids and highs.