This is so cool! If new contributions to Ruby could be written in Rust, I'd be a lot more inclined to contribute. I don't think I'm alone here. Andy Kelley noted that the new Zig compiler has significantly more contributors, likely due to it being written in Zig and not C++.

Some people may roll their eyes at this, but it is a lot more enticing to work on a Rust codebase than a C/C++ one. I'm less likely to screw up and create a serious bug; I get a lot more help from the compiler; the build system is standardized and simple; and it's just plain fun.