How long does Class A have?


Hi Guys/Gals
 I have a Sugden A21SE which is a Pure Class A single ended design, I absolutely love this musical amplifier with its strangely plentiful 30wpc, it runs hots as they do, I always enjoy watching the faces of my uninitiated friends when they touch it after I mention they get hot, lol.
But in this modern green era I wonder just how long do Class A amplifiers have before Greta Thunberg gets wind of this inefficient method of creating sound and pisses on the parade?

Thoughts?
mrmeaner
Imagine being so insecure that you can't fathom an 18 year old woman having something valid to say.
 WOW! I'm shocked!
This forum has lost sight of what's really important! 
The MUSIC! and how it's presented. 
Oh what's happened to humanity?
Must be all the pollutants! 
Imagine being so under-educated that you adopt the views of a 14 y/o child. 😜🤪
Imagine being so narrow minded that you are incapable of looking past myopic preconceived regressive attitudes about a messenger that you can’t hear the message.

But I’m sure you all have your PhD’s in climatology, which is why your opinion is more valid than their knowledge…