Same here, only C# instead of Swift. Native interop through C API adds some friction, but despite that, I also find it easier to use two distinct languages. C+

Same here, only C# instead of Swift. Native interop through C API adds some friction, but despite that, I also find it easier to use two distinct languages. C++ excels at interop. As you mentioned there’re many libraries that only support of C or C++ but for me their set is different, most often I need to consume native OS APIs and GPU APIs. Also, C++ is good at number crunching, when performance matters, e.g. because first party SIMD intrinsics support. For everything else I use C#.