He has replaced a lot of the ineffectual “wall” in high-traffic areas. Exactly the way it should be done before new wall construction.
Exactly right. It is logical to presume that the previous poor quality fence was built in high high traffic areas, deteriorated and needed replacement. A sensible planner would rebuild dilapidated sections in high traffic areas first, then move to areas where the traffic diverted after securing those bad sections.
While all of us would have liked 2,900 miles of new fence in four years, many posters have already pointed out all the multitude of enemies on this side of the fence thwarting that.