People have been rewriting software in better languages ever since there was more than one programming language. Eventually people will be rewriting Rust programs in GoombaLang or whatever. Isn't this what we want?
The point of the article is pretty much that you can pick stable technology instead of joining the treadmill of rewriting in whatever the new thing is. When people are rewriting rust programs in GoombaLang, C will still be around. When people rewrite GoombaLang into SmurfLang, C will still be around, etc
I don't think this is what we want. We want people to maintain and incrementally improve existing software and tooling and not rewrite and change things all the time.