Thank you. I'll accept that as a compliment. And stand by my words that there are no new designs, meaning topologies. But there's no shortage of guys that are former nuclear submarine engineers that want to sell magic boxes.
The reason for my video is that guy has called cathode bias amps auto-bias, stated that their incredible power supplies regulating screen and plate voltage would result in lifetime power tubes (on Audiokarma BTW)
https://audiokarma.org/forums/index.php?threads/tubes-for-everyman.705079/page-3
Then if you would WATCH the video, you will see his idea of a new autobias design he charges $1k upcharge for. If you don't care about that kind of stuff, that's fine. It's the noobies that get hurt.
I ignored most all of it until he took shots at PrimaLuna in one video, then another, talking smack over and over. The reason is PrimaLuna I suspect is the biggest selling tube integrated in America, and our other products are on fire, and have been since 2003. And it's all because of parts and engineering. Period.