Highlight has significantly enhanced its Query Builder by introducing a proprietary query language to better manage the large amounts of observability data it handles daily. This new language, which can be executed on both client and server sides, facilitates complex query structures with advanced numeric filtering and logical operations such as NOT and OR, thereby improving performance and setting the stage for future developments. The update also includes client-side query validation, which provides instant feedback to users for more accurate query construction, and an autocomplete feature that simplifies the use of operators like =, !=, >, <, <=, and >=. Syntax highlighting has been improved to make even intricate queries easier to read and understand, enhancing user experience by making query construction more intuitive and troubleshooting quicker.