You are probably talking about the Copenhagen interpretation, involving superposition.
Personally, I don't think this is the final theory.
Any theory using calculus, cannot be considered discrete, so is therefore not quantized, and not possibly "physical".
Gerard 't Hooft has more to say on this if you want to hear something from a nobel laureate on the subject.
I think what I've just said foots with your calculus comment, and also a Wolfram-like interpretation is closer to "truth" and your point on discretisation.
Why do you think discretisation/quantisation is necessary for the "physical"?
What can I search for to find his comments on this subject?
We are trying to explain, the physical reality we find outselves in, so, if the universe is fundamentally quantized, it must be discrete, as continuous math would reify infinities.
> What can I search for to find his comments on this subject?
You could check Curt Jaimungal's youtube, Hooft was on it recently.