Search is somewhat embarrassingly parallel right? So Postgres is great until you want to shard all of your queries. Which is (of course) possible, but then you'

Search is somewhat embarrassingly parallel right? So Postgres is great until you want to shard all of your queries. Which is (of course) possible, but then you're using attributes of a tool that aren't specifically tailored to your problem space? Postgres full text search is fast and easy, but it doesn't seem much more scaleable/reliable/resilient than a clustered search solution that is shaped to the problem at hand.