PowerLine: Status Line for Vim, Zsh, Bash, Tmux

Does anyone remember terminals with a status line? They get brief mention here — https://en.m.wikipedia.org/wiki/Computer_terminal. On a well-populated Unix machine, it could show a list of logins and logouts, updated every minute.

Same thing for shells (bash, zsh, fish): https://github.com/milkbikis/powerline-shell