[hnlmorg]

> But shell must be the world's most ubiquitous scripting language.

“Shell” isn’t a language. It’s a collection of languages. And not even a consistent one:

- Most BSDs don’t ship Bash as part of base. They default to ksh

- macOS does ship bash but an ancient version and defaults to Zsh

- Some Linux distorts don’t ship sh, instead symlinking to dash or bash.

- Windows doesn’t have any of the above as part of its base install.