They probably have another good reason to advocate too - 90% of anti-rust sentiment is "Gross, people like using it so much they tell others that they like it".
More like "Gross, people like using it so much they imply (or just outright say) other languages are inferior."
edit: apparently I'm "posting too fast", so I'll reply in an edit. What you (sophocles) said is effectively equivalent to "other languages are inferior", although I appreciate how you twisted the words up like that. Computers can be used effectively in a wide variety of languages. Do some languages age poorly? Sure. But not all of them.
But I absolutely take umbrage at the idea that "build a modern production OS" is the bar to clear for any new language to prove themselves because modern OSes are rare regardless of language of implementation. How many "professional grade OSes" have even been released in the last 10 years?
Next time a rustacean starts jumping up and down, show them Raphael Finkel's book Advanced Programming Language Design so that they can understand there is nothing new under the sun.
That's my point in a nutshell. It's a cool language. But there's a growing number of converts for whom this is their first introduction to these concepts, and they don't seem to have the intellectual curiosity to dive deeper.
I also see this behavior with Typescript and "powerful type systems"
Edit: Maybe these types of low quality comments exist on social networks, but... Isn't that just the norm for social networks? You can say the same about cooking advice on social media, or "life hacks" content, etc
Rustaceans would do well to read something like Raphael Finkel's book Advanced Programming Language Design where a whole bunch of languages and their unique features are shown/compared.