One huge advantage of C++ is Visual Studio. Once Rust gets something similar I might switch for my personal projects.
It also depends a bit on why you like Visual Studio. Because it has one of the best Intellisense implementations? Much more common outside Visual Studio for languages that are not C++... Good visual debugger? etc...
I am not so sure about that. C++ support in VS is rather terrible - especially when compared with support of C#. For C#, VS is excellent.
You may be thinking of the lack of full C99 support.