:x<enter> are also four. I don’t think you can do it in fewer strokes. In Windows I would usually use Ctrl+S, Alt+F4. Also four. You could maybe do Alt+F4 or Ctrl+Q or whatever and just hit Enter when the software asks to save unsaved changes. That’d be three strokes.
<ESC> Shift(Hold) Z Z, four!
:x<enter> are also four. I don’t think you can do it in fewer strokes. In Windows I would usually use Ctrl+S, Alt+F4. Also four. You could maybe do Alt+F4 or Ctrl+Q or whatever and just hit Enter when the software asks to save unsaved changes. That’d be three strokes.