I can't speak to most of them, but I would say that the effort to create a Python wrapper for Intel MKL and deep learning frameworks has proven to be an excelle

I can't speak to most of them, but I would say that the effort to create a Python wrapper for Intel MKL and deep learning frameworks has proven to be an excellent use of development resources. But that's Python, where the language is slow enough that any marshaling costs can generally be dismissed as a rounding error. The practicalities may be different in a shop that is deciding between Rust and C++.