Overview

• In a translated Unreal Fest 2025 interview, Sweeney argued many teams target high‑end hardware first and defer low‑spec testing to late stages, leading to stutters and poor frame rates.
• Epic says engineers will reinforce projects as needed and fold Fortnite optimization learnings into Unreal Engine to improve results on lower‑spec PCs.
• Version 5.6, released earlier this year, includes shader compilation fixes and Lumen and Nanite upgrades, with Epic citing estimated GPU gains up to about 25% and CPU gains up to about 35%.
• New complaints continue across recent UE5 releases, including Metal Gear Solid Delta, while other titles like Hellblade II and Fortnite demonstrate stable performance when optimization is prioritized.
• Some developers and analysts contest that workflow alone explains problems, pointing to platform constraints or project scope, though Digital Foundry notes UE5 can scale well with added development time.