And not all content takes the form of a how-do-i-solve-this-problem format. Would be good to see them re-purpose that good information (like this particular entry) into a useful format.
Like cough Wikipedia? Most of the entries on that page are links to a Wikipedia article with a one-paragraph summary. Seems like anything missing from the canonical list should just be added:
"What are some data structures not found on Wikipedia" is an objective question (but time-bound, which violates an SO policy)
I was thinking something more along the lines of what they did with Scala:
I do not know a good way to prevent that, other than through manual intervention (hm, thinking of it, machine learning could help here. One could train a model that knows, for example, that 'perl' answers from five years ago are more up-to-date than 'rails' ones from two years ago)