That's an awfully big "only" there... Basically you're saying that C is still winning because of the historically unmatched ecosystem of tooling and libraries and platforms and technologies and research areas, and the attendant uncounted millions of developer minds who are expert in all of that.

Well, yeah.

It's not enough for rust (I'm assuming this is all about rust, but you can insert your own favorite and the argument still holds) to be a better language to have done all this stuff in. It needs to be the technology in which it was actually done. Get crackin', basically.