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

Why would anyone want a blonde when brunettes are always better?

Orpheus10, I would say that tube phono stage is most important. SS class A line level preamp and class A power amp can be quite acceptable, at least.
Most people, if not all, do prefer class A amps and integrated amps from the same company, be it Accuphase or Luxman or Pass.

Why would women want audiophiles when there are better men ?

One has to take the time ( as little as absolutely necessary) to pause and reflect on the reality that written or spoken opinions are largely driven by the insatiable need to be acknowledged.

As someone who earned a living as an electronics technician, I am qualified to state what is "theoretically" better. While Class A is theoretically better, you need the hearing of a good hound dog to tell the difference between AB and A; maybe some young people got it, but I'm very doubtful about old folks.

What some old folks got is "deep pockets": deep enough to entertain their fantasies.

If I was rich, I would still have high quality AB, because I'm certain I can not hear the difference, so why pay so much just to heat the house.