Windows is built using BuildXL, a very different build system from MSbuild used in Visual Studio: https://github.com/microsoft/BuildXL/blob/main/Documentation...

> BuildXL has also been proven to scale to large codebases (e.g., Windows/Office repositories) where builds can consist of millions of processes with terabytes of outputs

BuildXL is also NOT compatible with VS and they have no plans to make it so. from the readme in the repo: https://github.com/microsoft/BuildXL

> There are currently no plans to integrate it into Visual Studio.