I've been using Phoenix rather than Rails as my go to for web development, but I still use Ruby shell scripting. It's dramatically faster to write than Python, Go or Rust, largely because it's got more convenient Unix interop than anything since Perl.

One example is, I've written a script that I can pass a domain name and an email address to. It will then set up basic nginx blocks, install certbo and add a cron job if needed, run certbot, get an https certificate and reconfigure the nginx blocks to reverse proxy incoming requests and force https.

I have no idea what language would have let me write this faster than Ruby did. Maybe Perl if I knew it well. Definitely not Go or Rust.