I think you're overreacting here - somebody barely mentions a language and you immediately start praising said language for features not even needed in this particular person use cases.
Short-term and long-term stability are needed for just about any serious software application or system. They're useful to have even for short scripts that might be reused later on.
And he said he was "terrified" by C++. I explained why he shouldn't be. I'm not sure why you're getting worked up over that.
I'm not! And I agree with all your points here. It's just that this is not a thread about C++, but about Rust, and about solving small puzzles with it for that matter. Which makes both original mention of being "terrified by C++" and your explanation a bit off-topic. I won't downvote you or anything, I just wanted to point this out.