Comment by int_19h

It's not an either-or (well, except for this last item).

It seems sensible to not write new software in plain C. Rust is certainly a valid choice for a safer language, but in many cases overkill wrt how painful the rewrite is vs benefits gained from avoiding a higher-level memory-safe one like OCaml.

At the same time, "let's just rewrite everything!" is also madness. We have many battle-tested libraries written in C already. Something like Fil-C is badly needed to keep them working while improving safety.

And as for wasm, it's sort of orthogonal - whether you're writing in C or in Rust, the software may be bug-free, but sandboxing it may still be desirable e.g. as a matter of trust (or lack thereof). Also, cross-platform binaries would be nice to have in general.