I predict that someone will soon join this thread solely to complain...ignoring the progress being made.
You are correct: it is, indeed, progress.
Of course, the fact that we’ll need 60 years or so at the current rate of “progress” just to construct the original 700 miles might strike some as a bit, oh, slow and this might engender some cause for concern.
They have already arrived in droves!
"Jorge won't build the fence, Jorge won't build the fence! What? Huh? They are building the fence? Whahaaaaaa... it's not being built fast enough! Whahaaaaaa..."