Well, the best thing with a digital box is that if its mostly just DSP, pretty much anything can be changed/added, as long as processing power and mem are not maxed out? So digitone might gain new abilities in the future…?
FWIW IMO ”classical” FM is a bit boring… you need to spam a lot of operators just to get more harmonics in the waveshape, I much prefer what elektron has done here with the additive & feedback. Without those, dunno how much more one would get out from 4-op sine phazemodulation compared to FM in A4… yeah sure, it would be linear, so plenty of ”stable”, cheesy e pianos to be had, but still… Something like u-he Bazille, now that would be a fun FM architechture in hardware!