I wish there was a comparison between this and zsh-syntax-highlighting and why one might want to change.
Well the comparison would be a superset: fizsh includes zsh-syntax-highlighting and zsh-history-substring-search, all 3 projects part of the zsh-users group.
It’s odd to not see Fish mentioned at all. I loved Fish, but couldn’t use it for day-to-day work because of the lack of POSIX compatibility.
My experience too. The omission rankles a little harder, since the title seems to be a reference: Friendly Interactive SHell.
It’s in the man page (See DESCRIPTION).
Syntax highlighting (with oh-my-zsh) is the primary reason I switched from bash to zsh years ago. Great to see more projects that syntax highlight an interactive shell! We’ve had color ls and grep for decades; why isn’t this default by now?