Something that I missed and not understand too well is how the Matrix apply in Animation Nodes, and whether it is similar to Sverhok or not?
Kind of want to emulate Array Modifier stacks, using AN.
So basically I start with "object duplication" just to make like a 360 FAN. Just a simple rotation.
Then, I was thinking, ok maybe I can Group this setup. Which I did. But the Object Instancer cannot be within group.
Next, I was thinking, ok this Group needs to be duplicated, but here I stuck. Suddenly, this is not working.
Any idea?

At some point Leon mentioned about Empty cannot be duplicated, but probably now can and we can cheat using Dupli Group or something.
Probably I was trying to do recursion of some sort.... well but not really but just curious if we can do it "that" way.
In simple case, it's almost like multiple Array Modifier stacks.
Maybe this is the limitation?
– Blender Sushi Guy Aug 06 '16 at 13:46