I've worked with both Rust and Go quite a bit, but not professionally with C or C++. Those two cover a lot of potential green field stuff, like networking, CLI,

I've worked with both Rust and Go quite a bit, but not professionally with C or C++. Those two cover a lot of potential green field stuff, like networking, CLI, embedded, etc (maybe not games/graphics as much). Rust is significantly harder to pick up, so check out Go if you haven't already considered it. Most people become productive quickly. That said, much of what you learn in Rust is generally useful for understanding, so it depends on what your goal is.