I didn't mean to imply that he was rude, merely that his dismissal went a bit too far. He threw the baby out with the bathwater, so to speak. In particular this bit:

>As a general trend the only things being written in these new languages are new web-facing applications, quite often proprietory or customized to narrow roles. Not Unix parts.

This doesn't really match what I saw of the Rust ecosystem and, even if it did, being able to write proprietary web-facing apps doesn't preclude one from writing "Unix parts". It's as if I said that C++ couldn't be used to write Unix utilities because it's used to write proprietary videogames. It's not a very good argument IMO.