Scott...
My post lost something mid-atlantic methinks!
You know that I know (!) how busy it can be out east, and certainly in the DFW Area and many others in the USA. But then there are a lot of airports for those aeroplanes to fly into. Europe ain't so lucky, where we have quite a few aircraft in a small geographic area but rather fewer runways for them to use. Hence the complexity, which isn't always a function of how many aircraft are in the sky.
By relatively
sparsely populated , I meant with
people and urban areas, not aircraft or airports.
Best rgds
BEX