That just seems to be the market where search engines have the most obvious business case, Elasticsearch positioned themselves in the same way. But both are general-purpose full-text search engines perfectly capable of any serious search use-case.

Their original breakout demo was on Common Crawl: https://common-crawl.quickwit.io/

But thanks for pointing it out, I hadn't looked at it in a few months, it looks like they significantly changed their pitch in the last year. I assume they got VC money and they need to deliver now.