The Nextone uses all sorts of references to things which aren't physically there, such as the specific power tube types. Their ad copy was done by pros during the time between things I can't talk about here. All the tube amps in the pictures are "things they studied" or whatever, but do they ever show the circuit board of the Nextone? I don't think so. Is writing new firmware or selecting a new program "physically reconfiguring the circuit"? I'd argue that it is (with a roll of the eyes), although the phrase is likely to be misinterpreted just they way they want it to be.