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

While I don't feel strongly enough about class A vs AB to become a television evangelist so I could spend a few billion to hire the Islamic State tosteal for me a Tzar Bomba to use against people using AB amps, I make my own class A tube amps because they are simpler to build and you can for a few hundred dollars buy parts as good or better that what you get if you spend five figures on a high end tube amp. I like my Magnepan speakers so I solve the sensitivity issue by using radio station transmitter tubes. If I use 45s by themselves I have to use sensitive speakers.But I have heard some fine sounding AB amps too.

"Why would women want audiophiles when there are better men ?"

Because we are better listeners

You're Welcome

... as already noted, because it does not always sound better. I can easily design a horrendous class-A amplifier.  Design is everything. All the practical benefits are noted as well, but i can further assure you that the cost (transformer, devices, heat sinks, etc.) of a pure class-A amp consumes resources that could be better spent on sound quality elsewhere.

I can design a horrendous class whatever amp too. That's not the point. No, design is a lot but it is not everything. There are limits of what is possible.
Orpheus10, there are great SS preamps, they are expensive and one can probably do better with tubes for the same or less but I don't know it.
Boulder, Gryphon, D'Agostino, Soulution, Accuphase etc.

Yet another fine example of a tempest in a teacup.

Hey, y'all.  Let's visit each others' homes and argue about the color selections of wall paint, furnishings, each others' shoes....

...that dumb aze Porsche vs. a nice Cadillac SUV.....with all the options...

The latter strikes me as the most blatant offering of a pointless ego toy that will NEVER see muddy roads....perhaps a deep puddle @ the mall....the bumpy RR Xing that gets 'tippy-toed' over...

Give it a break....:(