Michael, I understand your point of view and all your efforts.
I do the same job as you (software developing) :)

@You : "...If you need to do complex hierarchical assemblies..."

No Michael, I don't manage complex assembly.

But, actually, with both the current outliner and the absence of true "Parenting and Grouping", it's very hard to manage also very simple assembly.

But...anyway...I hope that one day you will put your hands also on these things.

Have a nice day ;)