It wasn’t obvious because I’m not quite sure why someone would suggest using software that both needs regular updates and will never get any more updates because those updates along with good faith open source contributions have been moved behind a paywall.
Part of this is because the article’s author pushes a lot of sensationalist content to drive traffic to their Rust book(s). I remember similar articles several times over the last year, at least one of which was a thinly disguised ad for the Black Hat Rust book. That doesn’t mean the author is wrong, necessarily, but it does get annoying after a bit.