Important Note: Some modern launchers (like Battle.net or Steam) verify game files on launch, which can sometimes reset executable permissions, though this is rare for this specific setting.

The biggest problem with the "Always Off" advice is that modern game engines have changed.

This is where the setting matters. If you are playing a game from the Windows 7 era (or a modern game using an older engine), disabling FSO can genuinely improve frame pacing and input lag.

In the old days of Windows 7 and earlier, games typically ran in one of two modes: