More a general comment than a question - the nested Empties are like a Matryoshka Doll 
(The “Baby, in a baby, in baby, n baby, in a mom” will give me nightmares Happy Halloween 
)
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You can use EMPTIES to group objects (we did this in the past).
Now you can use collections.
Also, you can create your own empty shapes.
Have fun!
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Oh, I will have fun.
I have so many ideas for empties. Camera to point at, related object modification, linked particle emitters (at least I do something similar in DaVinci Resolve Fusion), etc.
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Interesting, how. Assuming you mean like the Axes or arrow or circle ones? Not heard of that before and the default ones usually cover all one needs, but it might be handy to make more graphic ones for certain purposes.
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