If you start bolting search onto your database, your relevance will be terrible, you'll be rewriting a lot of table stakes tools/features from scratch, and your technical debt will skyrocket.
Or it'll be good enough for whatever minimal search use case you have, and you upgrade to vespa (or whatever new thing) later when it's actually needed. If we jumped right to the most capable long-term solution for every feature we had, our systems would be nuts.
https://vespa.ai is a purpose built search engine.
If you start bolting search onto your database, your relevance will be terrible, you'll be rewriting a lot of table stakes tools/features from scratch, and your technical debt will skyrocket.