I see how my post could have led to that interpretation. That’s not what I meant. There are certainly many many repos in use across Microsoft, for all sorts of

I see how my post could have led to that interpretation. That’s not what I meant. There are certainly many many repos in use across Microsoft, for all sorts of different projects. Office doesn’t share the same repo as Windows. And neither does the toolchain (compiler/linker/etc.); only the binaries are checked into the Windows repo. Those are truly separate products, which need to work across different versions of Windows.