Gordon and Harry both emphasized that the supreme goal of a high quality audio system is high fidelity to real sounds in a real space. Nowadays, the lesser goal of merely what sounds good is pursued. The latter goal merely relegates such an audio system to a toy, not necessarily devoted to reality.
The other day I was in a subway car in NYC. Guys came in with unamplified guitar and accordion. Even in a crowded car, the snap of the strummed guitar strings was instantly apparent. Almost no audio system of today recreates this live excitement. That's because of lousy recordings drenched in muddy processed effects, warm dynamic speakers and tubed or euphonic SS electronics.
You don't need fancy concert halls to experience this live quality of sound. People should get exposure to close encounters with the real thing, not audio shows and dealers who promote high priced goods that still don't deliver the excitement of real music.