> ends with an observation that's still highly relevant here but that you're neglecting to account for.
No, that's kind of the sentence I was responding to. Rust is already popular; that horse is out of the barn.
> And being widely used is not the same thing as being entrenched, not the same thing as being unable to say, "nice prototype; let's wrap this up now and do it for real this time".
I don't care to argue about the first clause, but I don't understand how you can argue the latter. Who is going to say "nice prototype; let's discard this?" Do you expect the Rust-using projects to just fold? Do you expect Rust developers to just disappear? Again, it sounds like you don't like Rust, which is fine, but as someone external to the community, why do you think anyone would listen to you about spinning down Rust?
> I hope people consider carefully the social costs of creating a new programming language especially if it becomes popular, and understand that in some cases creating a popular new language could actually be irresponsible.
And being widely used is not the same thing as being entrenched, not the same thing as being unable to say, "nice prototype; let's wrap this up now and do it for real this time".