Why not D? It's suitable for system programming and much better than Rust for non-system programming due to the default GC (but you can disable that where appropriate).

It run fast due to native compilation and program compilation time is much faster than its competitors including Rust and C++.

D also now testing memory ownership support inspired by Cyclone/Rust.

It can interface easily with C, C++ (via DPP), Python and R [1].

[1]https://dlang.org/blog/2020/01/27/d-for-data-science-calling...