I think there is another (alpha) about to come up for sale (not mine).
You said: "the Eigenharp is only for a small elitist group of advanced programmer types"
It is true that the instruments attract this musical interest group, and that they are vocal with their excitement, explorations and demands. However, They are not the only interest group even if they do skew perceptions.
Indeed, I think Eigenlabs has done a good job of welcoming and supporting the technical crowd without being diverted into that niche (no matter how large, it is still a fragment of the addressable market). Hopefully both aspects of this observation will continue.
I personally find it a bit disconcerting that some of the technical crowd seem oblivious to the notion that there are other musical contexts for the instrument and that these need support too. Fortunately, these voices are few.
Larry, like you, I have several instruments I play and my Alpha gets a bit lonely at times but I do find myself coming back to it and would disagree that there are ease of use issues with playing it. Seriously, simply selecting a sound (or a few), a scale, and playing has been something I find easier than just about any other instrument I've ever picked up. (Being good at it is another issue hehehe)
What is frustrating (unless it is your interest to tinker) is the customization of setups. For me, the MIDI improvements have greatly reduced that issue but that does take me outside of eigenD and I hope that the workbench will let me to do more things natively.