Books Seriously. Books are the ultimate long-form content; their authors typically spend years researching and writing them, and you can sample many reviews before committing to read one.
How do you avoid the problem of low signal to noise ratio? Some books in the popular business press can be reduced to several pages, with the core idea, rationale, and examples. Yet they all end up being longer than needed with tons of exposition.
But if you’re looking for a binary, then does it have an index?