I find it interesting that Ralph is predicting the eventual demise of tubed power amps. Aside from the supply chain issues and embargos with Russia I think they will be around for quite some time. Now I do like some of the newer class D amps including Ralphs. I think that the goal has been to get as close to the sound of a tubed amplifier with more efficiency and reduced cost. I recall reading an interview of that Bruno P fella and he said as much.
Wish there were more GaN integrated though. Trying to cut back on boxes.
Ralph has a winner as do Orchard and AGD.