I swear its worth it if only to get rid of that nasty pkgfile dep that causes random issues.
(and is a largely useless hog even when it isnt making a show-stopping mess)
And anyways the whole concept is a bit … odd … to me.
If zsh is default … then apply it system-wide.
If it isnt good enough to be in use for TTY … then it shouldnt be default in the terminal emulator either.