But most importantly - it's not a dump of all possible links, making a daunting list "I will never go through".
Source: I run workshops introducing to ML and Big Data (http://workshops.deepsense.io/, next one in London) and I made a lot of choices converging with this one (Python + scikit-learn, everything in Jupyter Notebook, etc). Also, a lot of links there is already in my delicious list of things I am sending to friends wanting to jump into data science (and many of them were already on the HN main page).
BTW: See also discussion on the same post on DataTau: http://www.datatau.com/item?id=10093
No one gets fired for using Scikit.
Experts use all sorts of things: MATLAB, R, Python (with scikit-learn), etc.
tdaltonc said "No one gets fired for using Scikit." Maybe I read too much into this comment, but it seemed to have a negative tone. So I got the impression that tdaltonc might have more to say about it. Maybe not though!