The BP is meant to hide actors, but it doesn’t disable actors, meaning if you have an expensive niagara particle or a device, you cant simply remove them based on scalability. For example, VFX creator on switch doesn’t work, and setting the VFX creator to not display on medium settings only hides the editor icon for it. It also doesn’t affect post processing volumes, which are usually the culprits for expensive effects (usually you want to use them to tweak the lighting on each scalability setting, but not possible - and env light rig is global, need something with zones)