"One of the great strengths of Python 2 is the long tail of 3rd party libraries" does not imply it is the "only measure"

The only point made in this entire article is that Python 3 is "killing Python" because a lot of Python 2's libraries haven't been ported.

Your quoted statement might not imply what I said, but this article damn sure does.

I'm a huge Python fan, and the main reason I'm a huge python fan is that it has solid libraries and bindings for just about everything. Python without its libraries is just another language, and honestly not really better than many other languages out there. Python without its libraries is python without its number one killer feature.

You are missing the point here. While you can use any C98 libraries in C99 and C11, the same is not true for Python2 and Python3.