I think that those questions (and answers) are helpful and useful as long as:
- they are complete
- they are accurate
Note that unlike most similar questions, it is possible to answer them objectively and the answer is definite (it may require some tweaking within the first few hours/days, but no long-term effort to keep it up-to-date).
I would therefore argue that those are a good fit for SO.
Let's review the list of close reasons:
- Duplicate: obviously not
- Off-Topic: not General Computing and Software, not Administration Related, not about a Recommendation or Off-site Resource, not about a Typo, ...
- Unclear: it is very clear
- Too Broad: a complete answer fits within the post limit
- Primarily Opinion-Based: obviously not
Too Broad and Off Topic are probably the only ones worth arguing.
It does not match any canned reason proposed by Off Topic however, and even though Too Broad does mention that a question should isolate an issue that can be answered in a few paragraphs the exact limit of "few paragraphs" seems rather subjective (the only definite length limit is whether you can submit the answer) and existing very good answers have been known to be longer (such as What is Branch Prediction?).