I would strongly disagree with that. C is finished, and what they've been working on for the past decade doesn't change that. I don't think you're arguing in good faith if you claim that the C development lifecycle is even remotely comparible to the Rust development lifecycle, and I'm not going to continue entertaining this.
I don't think that you're arguing in good faith when you claim that Rust putting out new versions means "it's not done" but C putting out new versions means "it is done."
My argument is not that they are comparable. My argument is that it's a difference of degree, not of kind.
The difference is obviously in what kind of changes are included in each "release". C has a specification (something Rust lacks) and C18 simply clarified unclear edge cases in the standard. No new features were added. Rust releases add new features and semantics, Q.E.D.