I'm not so sure if that still applies. Since the troubles in the packaging department in 2009-2013 I feel we are lacking behind other languages. Nowadays with fast internet, experienced packaging tool developers, etc, new languages like Go are fast to provide an infrastructure as good as ours or in some regards maybe even better. Some libraries are also itchy because they are written in C or Java style and not in Python style, yet they are in the stdlib. Not even the BDFL likes the stdlib that much any more. Python has a lot of cool features, that's why I will continue to use it. But the library is not the selling point any more, imho.