I whole heartedly agree that it’s important to keep learning over the course of your career. And I believe you that the author is aware of the nuance. But I think it’s also incredibly easy to read this piece as “add rust to your .net shop because it’s good for your career”.
I don’t know the author. But if I had to pull numbers out of thin air and take a guess, I’d venture 95% of .net shops where an engineer said “let’s do this new thing in rust” was overall a terrible decision for the team and a good decision for the individual engineer, everyone else be damned.
It’s wholly unfair of me to criticize the author specifically without knowing the context of the problem he was solving. My original comment was not worded well, but it was not as directed towards the author as it reads as, but more as a general counter commentary to the point the author was making.