Microsoft have announced that they will be supporting both C11 and C17 in Visual Studio 2019 version 16.8 Preview 3. All the required features but not optional features and not VLAs (Variable Length Arrays) which is considered unsafe.
One of the complaints has been that Microsoft always prioritised C++ over C for many years. C was supported inasmuch as it was needed for C++. Until fairly recently C++ was a superset of C and you could compile C program as C++. Just change the extension to .cpp.
That said, I will probably continue to write C code as C99 for now and take a look at the C11/C17 features such as restrict, stdnoreturn and so on. Note C17 is considered a bit of a bug fix for C11.