Abstract—This paper analyzes the performance of Wi-Fi 7 (IEEE 802.11be) in relation to high-density wireless networks and, more specifically, concerning parameters such as latency, throughput, jitter, and packet loss. Furthermore, the objective of the work was to assess the performance level of Wi-Fi 7 in relation to Wi-Fi 6 (IEEE 802.11ax) in terms of different levels of network loads, ensuring the capacity of Wi-Fi 7 to support latency-critical and highly bandwidth-demanding applications. A series of controlled experiments were conducted utilizing the NS-3 simulators, with 20-50 client devices connected to dual-band Wi-Fi devices with support for Multi-Link Operation (MLO) functionality. The traffics were generated according to models concerning Voice over IP (VoIP) communications, video conferencing, Augmented Reality/Virtual Reality (AR/VR) applications, and background TCP traffics in order to accurately represent application-level traffics in real-world settings. The outcome was such that Wi-Fi 7 derives up to 40% higher throughput levels and approximately 48% lower mean latency in higher-density networks in relation to Wi-Fi 6. Moreover, Wi-Fi 7 supported stable, lower jitter and negligible levels of packet loss even when increasing the density of users. These improvements were obtained due to architectural improvements, including channel bandwidths up to 320 MHz, in addition to utilizing the benefits of both spatial multiplexing and multiple, simultaneous link operations. These improvements confirm the capacity of Wi-Fi 7 to satisfy the ever-increasing demands in modern day city, factory, and smart infrastructural settings, ensuring overall high quality-of-service levels in high-density, high-demand wireless networks.