I don't think there is one programming language that is best suited for all types of programs. I think that Rust is probably the best language currently in use for specifically implementing Unix coreutils, but I don't think that this implies that (say) Zig or Odin or Go or Haskell would necessarily be terrible choices (although I really would pick Rust rather than any of those).
But my point was that there's no reason to think that the specific package of design decisions that Rust made as a language is the best possible one; and there's no reason why people shouldn't continue to create new programming languages including ones intended to be good at writing basic PC OS utils, and it's certainly possible that one such language might turn out to do enough things better than Rust does that a rewrite is justified.
But my point was that there's no reason to think that the specific package of design decisions that Rust made as a language is the best possible one; and there's no reason why people shouldn't continue to create new programming languages including ones intended to be good at writing basic PC OS utils, and it's certainly possible that one such language might turn out to do enough things better than Rust does that a rewrite is justified.