This talk focuses on recent advances in network softwarization for wireless networks and how modern systems such as 5G, Open RAN, and future 6G are shifting from hardware-based solutions to like Network Function Virtualization (NFV) and Service Function Chaining (SFC), which help make networks more flexible, scalable, and cost-effective. In this session I also discusses key performance challenges that arise when traditional and cellular network functions are implemented in software using open-source platforms such as OpenNetVM, OpenAirInterface, and srsLTE. These challenges include latency, resource contention, and performance interference. To address these issues, I presents practical and easy-to-understand solutions using DPDK, smart resource allocation, cache and memory management, and NUMA-aware placement. It also highlights the importance of energy efficiency, reliability, and low-latency support for emerging applications such as vehicular networks, IoT, and ultra-reliable communications.