The C++ jobs I've been approached about are in the music and gaming industries. Both jobs are audio-related. I have a strong background in audio signal analysis and processing, despite my minimal C++ chops.
Sounds cool.
I personally would take the C++ job because I have also some background in image and signal processing. Therefore the topic itself is more interesting than the tool, in this case C++, for implementation. Even if they use Rust I would take the job.