How long does Class A have?

ricevs, that is a possibility but even if they come up with such a state of  the art Class D amp there will always be people who will hold out with their Class A amps because they will sound better in a different way to their ears and will swear by it.

I choose 'what sounds the best at the time', not 'what sounds the best within emission ratings'. GIven this, it is full class A all the way come hell or high water.
I have several all class A Krell units and yes, I run them all at once. When I felt bad about the environment, I filled my roof with solar panels. The illusion as i found out, was that the panels are mostly not even recyclable.

Interesting thread.  That being said, I am currently in the market and researcing Pure Class A Tube amps.  So, not dead yet. 
Anyone interested in discarding theirs to save the environment, I will gladly send you my shipping address.  :)

I am in possession of the new LSA Voyager GaN amp. Minor tweaks include removing the top cover (the chassis is prone to vibration) and using Nobsound like spring footers which helped tremendously with speed and clarity vs the OEM soft rubber which IMHO prevents the amp from showing its true colors (NPI). It crushed my 2 year old EVS 1200, which I raved about. Seems the switching speed is a BIG DEAL, kinda like getting a much better dac could do


I recall someone saying it blew away his Clayton class A amps with the additional benefit of not heating up his room
hth