I’ll put this up top: My apologies if this is excessively basic.
A duplicate is not a child. It is a copy. It is also NOT an instance nor a clone.
A “child”, in the nomenclature of 3D animation, inherits the transforms of its “parent”, like a carousel horse inherits the rotation of the carousel platform.
So, using those terms incorrectly or imprecisely confuse the issues, which are already confusing enough. “Terms of art” should be used carefully to communicate clearly.
Just to make it clear:
Three separate objects: a platform, a pole, and a wooden horse.
The platform rotates.
The pole is a child of the platform, which moves along with the platform’s rotation.
The horse is a child of the pole, and slides up and down the pole on the zed axis.
The path of the horse in world space is a circular sine wave, very complicated.
But the horse’s motion is very simple, just up and down on the zed.
My apologies if this is excessively basic.
I would expect a Duplicate to have the same simulation as the original – it’s a perfect copy.