Hi Amliw,
I wanted to give you one more example but pressed the Submit button already...
That Azewijn track, I made that with 12 voices and 5 voices were for the Sinfonion (but those voices were the complicated ones, well most of them, not the chords), the rest of the voices where not done via the Sinfonion. In total for that Azewijn track I used 56 modules, so I estimated somewhere between 30 and 40 modules were used by Sinfonion (for it's channels, chords & arpeggio and the whole shebang), just for that Sinfonion (and all its channels of course). Just to give you a rough idea. Not that 56 should be a leading number, it's just an example. I am sure it can be done with less modules. I use usually rather simple modules trying to make something complicated. Others might prefer to buy a more complicated module then the complexity is already in just that one module and you don't need many extra modules to come up with the same ;-) So don't hang yourself too much up on that number, pure as an example here.
Kind regards, Garfield.
For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads