Earlier quoted context omitted.
> Any system that ranks things purely based on votes or view counts can have a feedback loop that can amplify "bad" results that happen to get near the top for whatever reason. I think this is a place where Google has pretty obvious algorithm problems. For example, I’m building a personal website for the first time in many years, and obviously that means I’m doing a fair bit of looking up new or forgotten webdev stuf…
Is w3schools that bad? for some languages, W3schools is as good a reference or better than the official documentation. And they're definitely better than most seospam.
Edit: I semi-intentionally forgot to mention Stack Overflow because it’s so unpredictable in terms of quality.