But they did under the hood chances to speed up the system. As example I was able to play crysis 1 on ultra at 60fps on my old machine, while on windows 7 i had massive stutterings in some levels like the train level. Also it will update your DirectX. And you could disable meltdown/spectre protections to speed up your conmputer. They are mainly for servers running foreign code of multiple users they can't controll (like in a cloud with virtual machines).