That's good data, but: is the reduction in vulns because Rust is safer, or is it because vuln researchers assume it's safer and so choose to look for vulns in C

That's good data, but: is the reduction in vulns because Rust is safer, or is it because vuln researchers assume it's safer and so choose to look for vulns in C/C++ code because it's what they're familiar with? It's hard to say.