Why would anyone want class AB amp when class A always sounds better ?

Im not sure what I'm missing, as in, who cares how efficient an amp is.  Are any of us concerned with how much power we consume while listening to music.?? We spend zillions to achieve the best sound on components speaker etc,  power is pennies compared to what i spent on speakers.  Same with heat . So What.   Ive got 4 tons of ac so bust out the marshmellows.  ive never understood why people bring those up when what we are going for is sound.

"The difference you hear with more/higher Class-A bias, is an easier, smoother, richer presentation to the sound, that’s no less dynamic and yet makes the speakers disappear, even as the music goes louder. And as a result the sound washes over you rather than being fired at you from the drivers, and that is the result of the lessening of the class-B xover distortion when you engage more and more Class-A bias."

That has been my experience as well. I experimented with various bias currents in my Integrated Amp and the sound quality improved considerably with higher values. The music had more body with a richer midrange, which was quite noticeable at low (SPL) listening levels. Nelson Pass talks about this in his "Leaving Class A" article.

the listener has final word. 
My amps will stand up to many class A amps. 
So will my Sunfire 600 sig at class H.