A question can still have more than 10 requirements and too many or easy to find answers.
In the same time, a question with only 2 requirements might don’t have any existing device at all or at least very unlikely to exist (for example this one).
So for me it’s obvious it’s the number of possible answers and how they are easy to find that should define wheather a question is too broad or not.
However it makes https://hardwarerecs.stackexchange.com/review far more difficult :‑). Because it require to try to answer the question first and possibly write comments and wait for an answer instead of overlook it and click on the close button (or not doing so for questions which are really too broad). :‑)
If there’s a correlation between the number of requirements and the number of products available matching the specification, should we require a minimum number of requirements (please note it tends de‑facto applied like robots do) ?