This is for Georgehifi especially but others can chime in.

they don’t require as much thermal runaway protection.

You keep saying that and they have it, talk to Gryphon and Krell who make some of the highest biased Class-A amp there are, and what do they use??? BJT’s WHY??? Because they give the best current ability.
And 4 X 150w pure Class-A that I made, BJT’s, and yes they were water cooled if you have doubts about getting rid of the heat.
Sure if your a dumb a**e and can’t design for s**t you can get thermal runaway I expect that from a backyard diy'er, but you don’t see any of the above doing that. And they will, I repeat, WILL out current any Mosfet amp into low impedance’s. Sorry but you have your head in the sand if you don’t know this.

Cheers George

Khost   you are like many incredulous audiophiles out there.

Guess what in anything that is subjective, the only way you know one thing is better than another is by testing via listening.

If you think a $500 Denon  amplifier and a $100k Technical Brain amplifier measure differently I think you will be wildly disappointed.

Please tell me the measurements which categorize a $1,000.00 bottle of Cognac vs a $20.00 one?

Please explain the way a superior car makes you feel?

Here is the basic problem you may know engineering you have a lot to learn about audio.  

Dave and Troy
Audio Doctor NJ

I think it's tawdry to have a Georgehifi specific thread. It's unfair to the rest of us, although it does allow me to use the word "tawdry." Also, are "doctors" Dave and Troy aware of the John Gorka song, "I'm From New Jersey?" A great song…trust me...

I also have a pair of the C1 P's, Dealer used Pass mono blocks to showcase them which were music to my ears.
I use D-class AVM 3,2 mono,s  and kt88 audiospace mono,s  both of which drive them well. I do prefer the AVM'S with these speakers but you could use tubes as well.
Dennis

Try the ATC P1, class A recommendation from Stereophile and on sale at Sweetwater sound inc.
https://www.sweetwater.com/store/detail/P1Pro