You can program or sample, and Cameo International has a Keith Emerson CD of Moog and his Hammond sounds. And, yes, you can use the SE1 for convenience because it's programmable by MIDI, you can send program changes and you can capture the essence of the Moog. But the Moog in itself is a musical instrument with it's own sound quality. As I've said, it's an icon. People want to see it.
People love seeing it.
The amount of people who criticize us for dragging the Moog around are far outnumbered by the amount of people who love seeing it. That instrument makes it more of a live show. One of the things that makes ELP exciting is the fact that things do screw up. This organ now resides at the Rock And Roll Hall Of Fame. It is now a T100.