Superstacking isn't an effect but a design.
A superstack doesn't start with one oscillator. You are stacking MANY oscillators. So you'd have to buy that many physical oscillators, mix them in a stereo spread, filter them in stereo, and modulate them with stereo VCAs (two mono VCAs).
The greatest advantage of modern digital computing the shear amount of DSP that can be generated to create crazy stacks of voices that would be prohibitively expensive in the analog world.