Because browser vendors have already invested too much into the existing C/C++ code base. They can thus accept new code with the same degree of coding standard.
Those same vendors are using Rust and Swift now which have comparable performance and solid interoperability. It seems like time for a policy saying new internet-facing code be implemented in a safe language.
Yes - I know both Mozilla and Chrome are doing this. The main thing I was thinking is that it’d be a lot more supportable if the response was, say, “we’ll add JPEG-XL only in Rust”.
