Bob Noel wrote:

The chokepoints are the airports in the US. Freeflight isn't going to be much
help in the US.

The chokepoints are a handful (less than 12) high volume airports. Those
airports are high volume primarily due to the hub connections through those
airports. Eliminate or reduce the hub traffic and those airports are much less
likely to be choke points.

Freeflight doesn't help directly with approach or departure contraints, but it
increases the options for getting planes away from an airport and combined with
point to point service (either RJ or microjet), helps indirectly spread the
traffic out.