I disagree with this. SO helped me with Python, Postgres, and SQL countless times.
If we are going to consider the value of SO, I would argue that it is a cornerstone.
If we are going to consider the value of SO, I would argue that it is a cornerstone.
Most useful info about Python from SO are pointers to the official docs in content-free answers. What is very valuable, because the docs are hard to navigate, but not what is expected.
About Haskell, C, or Perl, I currently ignore SO links, it's just less bother to go to the next result, and way more likely to get something useful.
But for Javascript, .Net, MS SQL, and a lot of other random stuff, SO is unbeatable.