For Rust vs c++: - I never used rust but I like the language and the safety it provides.

  - a mainstream package/dependency manager is missing in C++ so rust is clearly better on this point. This is a big problem for the C++ community where code is much less shared than in the javascript community for example.
  - The other big problem I have with C++ is compile time, I heard that Rust is slow too but I never compared the two.

And what robotics stuff have you worked on?

I'm building a offline programming tool for industrial robots: http://stara-robotics.com/