Community support in C3 is massive, as you can use C libraries directly, it might parallel or exceed Rust on that metric, and the barrier to adding native C3 wrappers or versions is significantly lower too.

Rust is solving a different problem, that of safety over all else. C3 on the other hand is more akin to developer experience above all else.

If you find something that should be easier to do in C3, that's a bug.