Since when do bash/zsh offer a full sane programming language, not relying in external executables, a full blown language framework ecosystem, ability to load shared objects and importing public symbols as functions, and interoperate with D-BUS (as COM counterpart) as if client bindings were functions (again withouht external processes)?

Could be, but that wasn't the argument. The argument was, that fish has nice auto-completion, and that could be done without $irrelevant_feature_list.

(Also, by the same token, Powershell isn't Windows.)

> stating that Powershell just mimics existing popular bash/zsh means your not aware of Powershell capabilities versus bash/zsh.

So what does it better than bash/zsh in the area of code completion? Simple tab completion? For history, Ctrl-R and F7? Woo-hoo.

> Since when do bash/zsh offer a full sane programming language, not relying in external executables, (...)

Which is completely irrelevant when we are discussing code completion.

Powershell Core is less Windows, that I grant you.

As for code-completion, if you so insist, I don't see anything better on Fish that is so great about it.

I also don't install needless stuff like oh-my-posh, I don't need jumping rainbows and what not on my shell.