[perlgeek]

Because if you want to ignore punctuation and case in normal situations, you leave them out of the search index. And then you can't query the same search index for punctuation and/or case-sensitive queries.

So they'd have to create a second index for probably less than 0.01% of their queries, and that second index would be larger and harder to compress.

As much as I'd love to see a strict search, from a business perspective I don't think it makes sense to a provide one.