If you just want the without security risks:
It removes telemetry and tracking to prioritize CPU power for games.
Some modern software and hardware drivers simply won't work on it.
By reducing input lag and system latency, these builds aim to provide smoother frame rates (FPS) for competitive gaming, especially on hardware with weak processors or limited memory. Security Considerations and Risks
: Often based on Windows 7 SP1 with integrated updates up to the end of official support.
When you download a modded ISO, you are trusting an unknown third-party developer. There is a real risk that the ISO could contain hidden malware, keyloggers, or backdoors embedded by the creator. Unlike official Microsoft ISOs, there is no checksum verification process that guarantees a safe file.