The article reflects the prevailing understanding as of 2010 (maybe as of 2015 among some people). I'm not going to address the entire article because some of the flaws are so obvious (at least in retrospect) that I'll just mention them briefly. In some areas, though, the piece deserves a more specific response because Handy does a good job presenting them and makes many of the arguments I continue to hear all the time. Once I respond here, I can just refer people to this blog.
My comments in red, as always.