I no longer "felt" my connection to my partner in the same way that I do not "feel" my connection to my arms or legs.
Because of the non precision of the translation of apilado as "piled up," and the use of "close embrace" to mean a non "weight sharing" "embrace," my personal, functional (I think) definition of apilado is that you can't maintain your balance alone.
This "Rely on the partner connection for dynamic balance," is correct, too, because in the real world there are changes in the amount of "weight," that goes into your partner.
The technical among us will ask, "how many pounds of weight do we share?" And the answer is, it depends, and it varies.
But, I can tell you that it feels great in a way unlike being "on your own axis."