That was purely on the list of reasons why I personally got interested in Rust and I support redox on patreon. I love the idea of an OS built on Rust from the ground up as a way to eliminate a category of security bugs.
The second slide is about when Cloudflare chooses Rust as a language.
It's listed under the Why rust (for me) slide. I.e. it's the authors own reasons/pros.
Does that mean it is actually being used in production, or is it just a potential? If so, I hadn't realised it had come on that far!
Rust is being used in production at Cloudflare. Redox is not used here in any capacity.