Reductionism vs StdQM and RealQM

Reductionism is a basic classical scientific principle of breaking down phenomena of complex geometry into constituent parts of simpler geometry. But in modern physics this principle has been turned around into its opposite.

Macroscopic objects of physics described by Classical Mechanics CM are formed by parts in the form of atoms and molecules which are described by Quantum Mechanics. 

Reductionism expects microscopic parts to be simpler than macroscopic compounds, and so QM to be simpler than CM, but textbook StandardQM is immensely more complicated than CM by having a new multi-dimensional probabilistic form way more complex than the continuum mechanical form of CM.  Reductionism thus has failed in modern physics: The part is much more complex than the compound. 

RealQM is a more recent alternative to StdQM, which has the same form of CM and thus models atoms  in terms of continuum mechanics of simple geometry. 

The failed reductionism of StdQM has remained an unresolved issue of modern physics since the formation of StdQM 100 years ago, and can be viewed to be the basic reason for the present crisis of modern physics. 

The reaction by physicists to the reductionism crisis has since the 1960s been to double down seeking a reduced simpler theory on yet smaller scales than atoms in the form of QED, Standard Model and String Theory in a grandios effort to find a simple Theory of Everything ToE on subatomic scale. Nobody claims that anything like a simple ToE has been found. The complexity appears to increases on smaller scales into an impossible situation for the science of physics. 

Here is an illuminating discussion with chatGPT on reductionism vs StdQM and RealQM.