One of the first things I tasked to do as a junior web developer at my first job was to make a horizontal nav menu that was responsive such that when the screen shrinks any overflow items go into a drop-down.
Baffling that a trillion dollar company can't do this.
Edit: apparently i don't know the difference between vertical and horizontal :)
File, Edit, View, History, Window, Help
Where there are too many items, it gets silently truncated. A simple dropdown icon on overflow is such obvious UI here.