Fluent Bit has emerged as a more efficient alternative to Fluentd for log collection, offering significant performance improvements, easier configuration, and better support for modern telemetry formats. The article outlines the key differences between the two, reasons for migration, and provides guidance on how to transition from Fluentd to Fluent Bit effectively. It emphasizes the advantages of Fluent Bit, including its alignment with OpenTelemetry and enhanced custom processing capabilities.