In my experience, writing small but critical shell-script-style mini-programs in rust can actually be a really good idea. The biggest drawback is, IMO, all the overhead of setting up an entire crate just to compile a tiny script, so I'm really happy to see projects like this (and other tools [1]) for this workflow.

[1] https://rust-lang.github.io/rfcs/3424-cargo-script.html#prio...