I think you'd probably better asked it here: Few Questions/Suggestions
But on topic:
For me I don't see any use in it.
Imagine all the Doop Secretaries PEEL has. That are Peelers with more than 10000 posts, the search engine would have a lot to do to collect all of them.
But what would be another feature the Search function could havr is to search in entire Peel sections (Futurama / Off-topic / Peel-Stuff) instead of single boards only.
And what would be much easier to implement is that search results are shown in a descending dircetion, not ascending as they are now. That means that newer topics are on top of the search and you don't have to click through topics that have been made 4 years ago.