Interesting take by Mr. Fortner.
I do recall Pat Metheny using Ableton Live in the way that Fortner describes for his Orchestrion show. Live was not the obvious tool of choice, because the Orchestrion's sound generators were all physical, motorized objects: real drums, real marimbas, etc. that were MIDI-triggered.
Using MIDI pedals, he fired off pieces of his compositions - an intro piece for example, then the first movement, then maybe an improv section (chord progression, drum groove, etc.) where he solos as long as he wants, then the 2nd movement, the 3rd movement, a return to the 1st movement with variation 1, then variation 2, perhaps a fill, etc. I read in an Emusician article that he had over 400 Scenes set up in Ableton Live