As was discussed in the nix-windows thread, I still think nushell is the best option I’ve heard of for trying to promote a new baseline for scripts in nixpkgs.
Particularly, it works on Windows, as well as the unixes.
I like the momentum of switch-ng, etc using Rust. But there’s a lot of last-mile scripts that don’t suit themselves to compiled languages in general; I think nushell scripts are a good fit. I’ve pretty much been authoring new scripts in nushell for over a year and am happy (despite some churn).
(To steelman my own suggestion, nushell still changes things between releases that would be annoying or worse. And it lacks trap, though I’m guessing that’s rarely used in these types of glue-y scripts)