I believe only the BSDs install real vi in the base OS. Everywhere else, when you type vi, you get vim. Some neophile Linux distros provide neovim instead. Re

I believe only the BSDs install real vi in the base OS. Everywhere else, when you type vi, you get vim. Some neophile Linux distros provide neovim instead. Regardless, vi and vim (and neovim) are the same in basic operations. It's still functionally correct that "vi is always installed" and no additional action is necessary for basic text editing.