In my opinion, it is already hard to sell a 61 key version of any synth. Many synths today offer 49 keys. I can perfectly imagine that there is very little demand for a dual manual synth, not to forget the implications on weight. So, yes, it would be quite risky these days to set up a production line for such a product without the certainty of any positive return on investment.
Personally, I would have wished Sequential to release a bug-fixed and production-grade version of the firmware for this special anniversary.