Well explained adl.

More probing....

"CPS was actually created to emulate this workflow for machines that had Maya Complete in times it did not offer SubDs."

SO now as SubD is part of complete would you use CPS? if yes then why?

Is it because of what you wrote-

"It´s often used to emulate SubD´s workflow by smoothing a lowpoly cage in REALTIME (Thus eliminating the need to smooth at certain steps the poly cage to check progress)".