Because that isn't a question anymore. Not as we normally think of questions here on Stack Overflow: problem statements, with specific answers written by individuals, ranked according to votes received.
I could give you a long explanation for why that is, why we kept that "question" around when so many similar questions were removed... But it's easier to just show you.
This is what that question looked like a few weeks after it was asked. Three answers, none of them much longer than a sentence, one consisting of a now-broken link and another of someone's idle opinion on how Node should be learned. A pretty poor showing indeed - I would challenge anyone to defend a question like that as particularly useful. But such questions - resource-requests - were fairly common for the time; we were still figuring out what worked and what did not.
Eight months later, the situation wasn't much different. Oh, there were a few more answers, and a lot more views... But not much in the way of votes for all those views. Some links were already broken. Clearly, this - like so many other such questions - was not working.
Then, over a year after the question was first asked... Something happened. Instead of dropping another answer with another link onto the page, someone had the idea of trying to organize the various resources they'd found useful, cataloging them in a single answer. Others joined in, adding and categorizing. And readers found this useful.
At this point, it stopped being a normal question. What grew up then and exists today is essentially a wiki, a collaboratively-edited compendium of information on a given topic.
We didn't really plan this. It's one of those things that happens sometimes when folks see a need and use the tools available to them to address it. Since it happened, and continues to be maintained, we allow it.