....
To get an idea of other points of view (valid, invalid, interesting, whatever)..... To perhaps learn something?
To call the article "that piece of trash" without having read it, makes as much sense as Norminn throwing comments out about the article without providing the source so others might follow in depth.
I made a first read of most of the article.... I found it interesting. I'd have to read all of it (more than once) and follow up on references (explicit or implied) to attempt to answer the very valid question...
If NYC yes, then why Chicago no?
At all cities are alike so we're dealing with a multi-variable situation. Perhaps someone has or can tease out the "why".