In Ubuntu 18.04 by default, if you hit the 'windows' key, you get a smooth old-style Expose effect that shows all the windows. The only differences are that if

In Ubuntu 18.04 by default, if you hit the 'windows' key, you get a smooth old-style Expose effect that shows all the windows. The only differences are that if you type into that view, it searches Spotlight-style and off the right side there's an auto-hiding multi-desktop switcher. Both are tastefully descreet and strictly improvements imo.