My favorite tools are Python and fish, so your insults about the others don't really hurt. I almost never use bash because I don't care for it either. Those other Unix command-line tools are arcane too, but they have a mostly compatible syntax. Don't use many of them besides a grep alternative and an occasional sort perhaps.

There are languages optimized for interactive use, and others for writing batch scripts and programs. Fish is great for interactivity, Python not so much. So they compliment each other quite well. There have been a few attempts to do both (xonsh/iPython), but none have been big hits yet.

Performance is important for long-running and/or computationally expensive apps, which are typically not interactive. When I brought it up, was thinking of Gimp filters, not "ps -ef | grep FOO".

Javascript is probably good enough these days. If you want to create a "jsh" interactive shell with the good parts have at it. Believe it is doable by a single person in a reasonable time. I'd guess a few might already exists and could use contributors.

Re: widgets, meant that few are standardized/built into the browser already and have to be downloaded, not that none exist. A silly situation (as someone who wrote GUI apps in a single language in the 90s), yet could be rectified.

But in thread about GUI Window systems you are going on and on about the limits of bash, which is why your arguments are not well received. It's really neither here nor there regarding Wayland. Shell scripting hasn't held me back since '98 or so, if it ever did. It's like complaining about vi when Sublime Text and VSC exists.

I get that you appreciate good software design, me too. But "worse is better" is the reality we live in. Things get better, eventually.