I'm willing to bet that it's AI. It soft-contradicts itself quite often, emphasising that C++ is "Performance First", but then also claiming stuff like "Rust achieves memory safety with zero runtime overhead".

Edit: What I am trying to say is that I have seen text like this in LLM output quite often, if the LLM is mixing text from different sources in its training data.

Also, there is just wrong stuff in the text itself, not only in the conclusion. For instance the claim that Rust's type system makes data races impossible. They are easier to avoid, but there is nothing stopping you from writing data races... Here, for instance, have a data race in safe Rust...