Logstash 7.0.0 introduces significant enhancements for users, featuring a default Java pipeline execution, automatic index lifecycle management (ILM), and updates to plugins. Originally built in Ruby, Logstash now leverages JRuby for improved performance, but recent developments have shifted its internals to Java, allowing Java-based plugins to interact directly with a Java pipeline for better efficiency and reduced memory use. The new Java execution engine compiles directly to JVM bytecode, offering up to 20 times faster startup and reload times for large configurations. The release also includes automatic ILM deployment with the Elasticsearch output plugin, which detects ILM support in the cluster, and allows users to enable or disable this feature. Additionally, deprecated and obsolete settings in various plugins have been addressed, marking a significant update in Logstash's usability and performance.