If you are in a field where everything is being rewritten in Rust, then it may be a good idea to spend some time on it. It is not the case of every field though.

Basically, Rust seems like a good replacement for most C++ applications. It offers memory and thread safety guarantees with no or minimal overhead and a speed comparable to C++.

I am currently working on two projects: one in python, one in Rust. I am a proficient C/C++ dev but I think I will ditch C++ in the near future. I am not sure it makes sense to replace C with Rust unless safety is required.

I don't see rust replacing python. Rust is painful to write, it is longer than C++ and python is much more productive when you can afford the overhead.