That is a good scenario, however you can still use languages like D, Nim, Swift, C#, F#, Go, among others for such scenarios.

For example, you can do codecs in C# on WinRT with .NET Native,

https://docs.microsoft.com/en-us/windows/uwp/audio-video-cam...

In the context of protobuf,

https://devblogs.microsoft.com/aspnet/grpc-performance-impro...

Back to Rust, yes it is a good option, I just wouldn't write the whole application on it, just specialized libraries.

Hence why I am looking forward to Rust/Windows efforts.