[vermaden]

The ZSH shell would be actually great choice for shell in the FreeBSD Base System because it uses the MIT license.

As BASH uses the GPL3 license it does not have the chance of being included in the FreeBSD Base System because the FreeBSD project currently tries to remove all GPL3 licensed software from its base.

Details here:

https://wiki.freebsd.org/GPLinBase

[kevans91]

Minor nit that we mostly hadn't moved to GPL3 stuff, and now we're working on replacing the remainder of the GPL2 stuff.

[unanswered]

zsh isn't POSIX compliant though.

[gigatexal]

It's not? In what ways?