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

Nothing better than A/AB amp. 
   Enjoy the tunes

I agree @arcticdeth.

Too many of the above posts are comparing apples and oranges.

For the same investment in resources, i.e. cost and design skill, Class A will always sound better.

TSUNAMI COMING! 

Idk...my sugden A21se single ended class A sounds wonderful to my ears. Probably the best I’ve heard thus far. It somehow is adding something to the music that, at least to me, sounds more natural or organic. Maybe its in the design, maybe its added distortion...who knows? All I do know is that I’m either hearing or at least perceiving a noticeable difference in a good way. This is not to say that my Marantz pm14s1 sounds worse in any way, I’d rather say it sounds different. I will say that the sugden does seemingly run out of some breath at very high volume, where as the marantz seems to have more headroom. However, at a lower volume (where I generally listen), I gotta give it to the sugden. It is doing something right that makes me me want to keep on listening. Its a beautifully designed amp by the originators of SS class A, since 1968. Countless reviewers of the A21 have felt the same way about it as I do, so I don’t think I’m nuts. Is it the absolute "best" amp available?? Of course not!! However, for what it costs and what it does do, it does a darn good job. No bells, no whistles, no dac, no phono stage, no digital whatsoever, All Amp... Also not sure why people harp on how hot it gets..its class A! Always on, always ready. If I want to pay a higher electric bill, so be it. There are some much older a21’s still in use today with zero issues, despite the heat.
https://en.m.wikipedia.org/wiki/Sugden_Audio#:~:text=In%20April%201968%20the%20A21,amplifier%20under....