BigQuery Vector Search

I'd love to hear the bull case for standalone vector DBs at this point. After exploring a few, there's not much differentiation from what's offered here (beyond maybe a nicer developer experience than GCP's) and I'd expect many other DBs/data warehouse to follow the same path as BigQuery has.

It looks like there's still plenty of hard problems in the indexing side of RAG and so maybe the vector DB that leans hard in that direction will carve out something defensible? Outside that, can't find a good reason to standup yet another piece of infrastructure purely for vector search.