I found watching Wogglebug on a dual trace scope helped me understand what it was doing… at least the non-audio rate sections anyway. It’s not even random with the Id knob turned down, but an S&H with its own clock, slew, and the Woggle circuit which behaves in a deterministic way. I found it an interesting way to create alternate versions of envelopes, for instance.
I still found Marbles much more to my liking personally, due to the looping, CVable quantization, rhythmic interplay of the outputs and option to sample the values.