Before I ask a question, I always search with the "Search Q&A" box to see if there is already a question and answer about the topic. When there is no question, I start a new question, but often the question I was trying to find shows up in the "Questions that may already have your answer" section!
Here is an example I just encountered today when I was going to ask a question about a feature in Europa Universalis IV.
(entering the same title):
The third result here answered my question.
Why does the "Questions that may already have your answer" tool work better than the conventional search tool?
If the search can't be upgraded, I think this option should be included in the conventional search.