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

Well, class A is not exactly ecologically sound design, that's true. But it is my only objection. 

All I know is the Sugden A21SE I’m running with at present is the best sounding amplifier I have owned to date, not that I’ve owned that many amps really but it’s also the best sounding I’ve heard apart from a Sugden Masterclass, yes it gets toastie but at 30wpc at 8ohm it’s got an amazing amount of kick, the kind of power amplifiers like the Hegel H190 with 150 watts struggles to match, but at the end of the day an awful large part of being an audiophile is thinking with the heart and everyone will always have their correct opinion, that’s what makes us spend silly money. 😂

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.