I took @ModalElectronics’s advice and watched the interview with Philip Taysom:
Some interesting, and potentially pertinent takeaways: The design for Argon8 was laid out at the same time as Skulpt, and Taysom mentions that they actually designed several synths at that time. He describes building a framework that could be adaptable to a lot of applications (I assume this is the sort of DSP chipset guts? I am not an engineer, but the suggestion was that Skulpt and Argon8 shared some common factors, and in doing so, they could design more synths on this foundation without having to dive into R&D every time).
He also mentions that they have a few synths waiting to be released.