Hi-Fiish sounding means to me artificial sounding. Natural sounding is High End. One can find plenty of Hi-Fi gear in Best Buy. Atrocious sounding SS amps, sold in 70s, were also called Hi-Fi since they met German DIN 45500 standard.
I cannot call my system High-End when the most expensive part of it - "The Room" is "Mid-Fi".
I cannot call my system High-End when the most expensive part of it - "The Room" is "Mid-Fi".