Remember, when power demands increase they do so exponentially. Sometimes it comes down more to what kind of music you listen to, than where the volume knob is set at.
As the volume increases the benefits of Class A can begin to diminish. While some might prefer to listen to compressed dynamics that fall short of the live experience to enjoy the luxury of some greater time in Class A, others are willing to sacrifice some time of the suaveness of Class A to have more life like dynamics without the anxiety of impending distortion.
Of course there are also other considerations too.
As the volume increases the benefits of Class A can begin to diminish. While some might prefer to listen to compressed dynamics that fall short of the live experience to enjoy the luxury of some greater time in Class A, others are willing to sacrifice some time of the suaveness of Class A to have more life like dynamics without the anxiety of impending distortion.
Of course there are also other considerations too.