It's not, nor is it well informed. People are currently developing languages specifically for use by LLMs.

> It's not the best tool for the job for a lot of things

Then how could it possibly be the final language?

> if the LLMs make writing it as fast as anything else - whelp, I can't see any reason not to do it in Rust

This has nothing to do with the claim that it's the final language.