[jjice]

For current job availability, C++. For enjoyment (in my case) and potential future jobs (not guaranteed), Rust. C++ is tried and true and it's proven itself for sure. Rust is just more fun to work with for me though. Lots of good tooling and documentation for both as well.

[klysm]

C/C++ have proven themselves impossible to write in a secure manner at any useful scale. The evidence is overwhelming.

[Glamhoth]

C and C++ are the most common languages in avionics and space

[klysm]

I'm not sure the history of software driven avionics and space accidents really support that as an argument for their safety?

[xaxaxb]

written by trusted expert programmers.