I think it's more the hand-in-handedness that seems to exist between "rewrite an existing, mature tool" and doing it in Rust. Half the time it's hard for me to know which caused which — the need for the tool, or the desire to rewrite something in Rust.
The other options are C, C++, Go, and maybe Ada or Zig, though I haven't seen many CLI tools written in those two in practice. In practice, it seems like Go, Rust, and C++ are the preferred languages for newer CLI tools, although I have no data; my conclusion is based on my general perception. Older ones, C and Perl.
I'm a lot happier with a fad for Rust-written CLI tools than the disappointment of reading install instructions for a simple CLI tool that starts with "First... npm... bower..."