As I said before: there is one exception at this moment: https://www.axign.nl/
that is very impressive
Technology - Axign
The Axign technology of the digital feedback loop is a first-in-class technology with its full audio bandwidth feedback loop.
www.axign.nl
one thing is certain - when we have 100 kilowatt amps delivering 0.0001% THD @ 95% efficiency "audiophiles" will continue to claim their 3 watt amps with 3% THD and 1% efficiency are superior and that anybody who disagrees with them is "deaf" ...