It definitely depends on your use case. If you are just searching through the entire array at all times, then this is certainly an acceptable option (you could even flip it all onto a GPU too).
But when you start to require filtering or combining the vector search with a lexical search, then something like Pinecone, Vespa, Qdrant, Lucene-based options (e.g. Solr and ES) etc. become a lot more practical than you building all that functionality yourself.
But when you start to require filtering or combining the vector search with a lexical search, then something like Pinecone, Vespa, Qdrant, Lucene-based options (e.g. Solr and ES) etc. become a lot more practical than you building all that functionality yourself.