What if you Delete the System on EVERY OS?

Windows, MacOS and Linux all have crucial system folders. On Windows it's system32, on MacOS it's the System, Linux - it's the root folder (on a broader scale). However, what would happen if we deleted them all and compared the results? NOTE: I know that all these folders are extremely different from each other between each operating system and System32 on windows is not entirely equivalent to Root on linux.