No sure why you guys are acting like 4K is unreasonable. Yeah it's expensive, but no worse than what Mesa, Friedman, Soldano, Bogner, etc. are charging for their flagship models. Just looking at features alone, 4K actually seems more than reasonable to me.
I'm hearing a plethora of quality sounds. I even heard a change in tone/mids when it was switching between EL34, 6L6, and both. Many times that doesn't come across as well on other amps that can run several octal tubes. I did chuckle when the dude said 35 lbs was heavy. That's feather light; especially for 120 watts, if you're used to lugging around big iron. It doesn't seem to have MIDI which would be a letdown. With that many features and options it's pretty much a must have.
That said and as interesting as it is, I'm not convinced it could add to or replace what I already have. Also $4k is past my comfort threshold of what I want to spend on an amp. I'm also not really sure who this is being marketed to. I think the younger crowd would go for a modeler and old schoolers would rather vintage iron. That plus, there's not too many analog rack guys around anymore. But overall, I wouldn't be fully opposed to checking one out if it came up at a good price used. I'll at least add it to my list to keep an eye on.