Are there game studios out there still using C? From what I've heard the majority is using C++, so switching Rust just makes your life easier without changing too much (C++ devs already uses templates, smart pointers, RAII, etc. which Rust has too, but with a better design (a stronger type system, and also hindsight from 30 years of C++)).

From what I've seen on HN, Zig seams to appeal people who like the “simplicity” of C and find Rust too complex, but I don't think anyone coming from C++ could find Rust “too complex” (a bit different, with a learning curve indeed, but not “too complex”).