C is already much better, but we still have some boilerplate. Currently this is the bare minimum:

  #include <stdio.h>
  int main() {
    printf("Hello world\n");
    return 0;
  }

But I wish we could get rid of that "boilerplate" #include. I think compilers could add it by themselves when needed (many already suggest it to you if you forget it, so they do know when it's the case).

On the other hand I wouldn't get rid of the explicit return from main(), as it has an important pedagogical function.