[forgotpwd16]

Issue is the cognitive overhead to know 2 distinct shell languages. One you use, and one (almost) everyone else uses. If later isn't of your concern and Fish is all you interact with then no issue whatsoever for interactive or/and scripting use.

[mikkupikku]

Not to be funny, but is POSIX scripting even still relevant? It's well understood that they should only be used for quick and simple tasks, and anything more serious or demanding should be done using something like python instead. But these quick and dirty tasks are very easy for LLM coding agents to do in python. I used to have dozens of shell scripts, each no more than tens of lines long, in my ~/bin/, but I had an LLM rewrite all of them in python, adding proper argument handling, --help messages and error handling too in the process. I sincerely don't think I'll ever write another bash script again.

[sgarland]

Do you know how many CI/CD pipelines run on shell scripts?

Another example is small utilities. I wrote one to login to MySQL DBs at work. We have to use Teleport, which I dislike, and it has MFA. So I made a small SQLite DB that has cluster names, endpoints, and secret ARNs (no actual secrets, only metadata), and then wrote a shell function that uses fzf to parse the SQLite DB contents, then ssh tunnels through an EC2 with Teleport to the selected MySQL DB, using expect with a call to 1Pass to answer the password request, and then picks the first available port >=6033 to connect the mysql client. It also tracks the MySQL DB : port assignments in the SQLite DB and waits for the client to exit so it can tear down the ssh tunnel. The only input I have to do beyond selecting the DB is answering a push notification on my phone for MFA.

> replacing 10-LOC shell scripts with Python

The startup time would drive me insane. I love Python, but it’s not great for stuff like that, IMO.

[rovr138]

I write all my scripts in bash. I'm not learning a new language.

That's not a problem since it's available and when #/bin/bash or env bash is there, it just works.

My bash scripts are stored in a folder on my PATH, so it all just works.