DSE Search is a powerful search engine built on Apache Solr, but its limitations, such as the two billion document limit per shard index and write-amplification, can hinder performance. DataStax's Storage-attached indexing (SAI) provides a more flexible and performant alternative for equality filters on indexed columns, without requiring full-text search capabilities. By using SAI indexes with Astra DB, developers can replace complicated Solr queries with faster lookups, such as filtering movies by title or release year, with syntax familiar to developers. SAI offers efficient retrieval of results due to its unique indexing mechanism and supports range queries, enabling developers to build high relevancy and low latency applications.