Rust Is Not a Good C Replacement

So Rust doesn’t aim to be a C replacement, I’ve never heard anyone suggest that. It’s clear that it aims to be a C++ replacement.

C++ is also used more than C in the world, so I’m not sure I get the argument that it isn’t useful.

Rust will likely succeed in replacing much of C++ or at minimum push C++ in its direction.

Lots of programs need concurrency, and yeah it’s a huge pain in C or C++. Go is great till you need to leverage C libraries

I bet Swift beats them all in number of features introduced per release, and that's not a good thing.

These things do not change the fact of undefined behavior and even experienced programmers build a lot of critical bugs.