Bob a short but not quite correct answer woold be, Normally we start with
Planck's constant a formulate quantum mechanics. Planck's constant is not
classical. One of the things that come out of this analysis would be the
classical radius of the electron.
Now lets say that the classical radius of the electron is an effect of mimimun
of stray capacatance. That's a classical idea. Now lets reformulate quantum
physics, not starting with Plancks constant, but rather starting with the
classsical radius of the electron. Planck's constant then falls out as a
dependent variable.
The big deal is that now the foundation of the model is classical from the get
go. A lot of other things fall out also like the non-conservation of inertial
mass.
thats it in a nutshell.
Frank Z