<p>➀ STH explains its choice of AMD EPYC over Arm in 2025 infrastructure, citing Arm's challenges in enterprise adoption, including installed base compatibility, hardware limitations, and insufficient software support;</p><p>➁ Power efficiency gains from Arm are now minimal compared to AMD/Intel x86 CPUs, especially with AI GPU servers dominating power consumption (e.g., AMD Instinct MI325X at 1kW/accelerator);</p><p>➂ Enterprise Arm adoption faces hardware scarcity and vendor neglect: NVIDIA Grace CPUs are outdated for general workloads, while major vendors like Dell/HPE offer limited Arm options (e.g., HPE ProLiant RL300 Gen11's market failure).</p>