What sort of hierarchy breaths and depths are people running into in the real world?

Numbers please!

Thus for a large telephone company I deal with, I have a table of 300 nodes at 5 levels.

Each terminal node deals with one or more fairly high level objects such as a company project above a certain cost.

Of course, starting at each such a node you typically start a new tree with lots of details - typically 50 more nodes at 3 levels.

But the main tree and sub-trees are dealt with separately.

And this is where the fun starts.

So what sort of hierarchies are people dealing with in the real world?

Is it really zillions of nodes?

Or is it a couple of hundred most of the time?