They are, in my opinion, at their best.
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Redist\MSVC
It's worth noting that % VCINSTALLDIR% only works in the Visual Studio Developer Command Prompt. That may be found on your start menu under the Visual Studio XXXX folder, or it can be started immediately from within Visual Studio. After that, you can enter.
in the terminal to get where the directory is located on your machine.