It's still too early. There's tons of good reasons to write C code today for many projects. Furthermore, there's so much C code out there that even if nobody wrote a single new line of C today, it'd be decades before it would go away.
It's really about growing the pie rather than replacement anyway, in my opinion.
Although, a lot of us are working towards replacement of C in a lot of areas. Being able to say you've written something in Rust is one thing, but having the whole stack Rust all the way down is something else. Not to mention, it's fairly simple to create C bindings from Rust libraries using Cargo workspaces and cbindgen.
It's really about growing the pie rather than replacement anyway, in my opinion.