YugabyteDB 2.15 introduces several key innovations to support dynamic workload optimization, enabling applications to adapt to changing requirements with greater ease. The new features include Quality of Service (QoS) and multi-tenancy, admission controls for heavy cluster utilization, prioritize transaction execution, rate limiting connections per node/tenant/database, admission controls for write-heavy workloads, stop writes triggers, slow down writes triggers, and dynamic app-aware sharding. These enhancements allow YugabyteDB to manage diverse sets of applications and their inherent unpredictability with greater flexibility and application support, making it easier for organizations to thrive in the face of changing workload demands.