[toyg]

> Every system Homebrew is installed on has Bash installed

Ironically, they are also moving from bash to zsh for default shell. Again not an unsurmontable challenge (just make sure the bang is correct in your scripts, bash will likely still be around somewhere in macOS for the foreseeable future) but another little hurdle to mind.

[Sean1708]

As far as I'm aware they're not changing anything about which shells are installed or which executable /bin/sh points to they're just changing the default login shell for a new user, so nothing should have to change about the scripts that are (or have been) written.

[Fnoord]

Doesn't surprise me given they dislike GPLv3 and Zsh is MIT.

Personally I try to use #!/bin/sh as much as possible, and Fish as my default shell.

[holtalanm]

upvoted for fish