I recently get Reaktor 6. Of course, that software is impressive and has much more capabilities than Sync modular. It goes even deeper in signal processing so that the sound designer can build more powerfull and more clean ensemble.
So maybe in order to design correct ensemble, Vadim has introduced event signal, clock signal, read module, write module, latch, etc etc...
That's great, surely, for sound designer ?
But one thing that Reaktor has loosed : it's simplicity and readability.
As it was quite difficult, but possible to understand Sync modular ensemble, i think it's nearly impossible to understand reaktor ensemble.
Furthermore, all the knobs has to be out of a core cell and not just connected near their respective module, so it add even more difficulty to understand the meaning of all that.
Finally, Reaktor is certainly a great sound sofware for sound designers
But it's also awfully disappointing for large majority of musician who are interested to deep into their ensemble in order to understand the sound they use.
So, i still think that sync modular was unique by its large possibilities despite of its relative simplioity and pity that this soft was abandonned this way.