Same Texture Scale for different Mesh Sizes

Thank u . But i have a Question to WorldAlignedTexture. Everywhere i can read that its using much more Performance than a Normal Setup of Materials . But nowhere i can read why . If i Set Up a Normal Material OR World AlignedTexture and lets Say i came Out By 200 Instructions for Both Ways. Will be the Impact that much ? I know it depends on what Functions i call in the Material , but is there some Massiv extra Processes for World Aligment that i didnt know /See ?
Or is Performance in that Case No more a big Thing since the Old Days of Unreal Engine /Infos About World Aligment?