I take issue with the idea that you can count PyPy as a +1 for Python's speed without also counting it as a -1 for libraries. Especially considering SciPy and NumPy are not yet supported by PyPy, which means you lose out on a lot of libraries that depend on them. (For example, sci-kit learn).

You can't say that Python has both speed and great libraries. It has one or the other. Hopefully this will change at some point and I'll be able to reap the benefits of both.