Aiven now supports Apache Cassandra® 4.0, the first major version upgrade since 3.0 was released in 2015. This new version offers improved stability, better performance, and faster speed with up to 25% faster throughput on read and write operations. Key features include enhanced metrics via virtual tables, workload replay with full query logging, audit logging for enhanced compliance, and Zero Copy Streaming. Users can upgrade to Apache Cassandra 4.0 from Aiven for Apache Cassandra 3 or try the latest version with a free 30-day trial.