Old hardware will do it. I was on Ubuntu right before it changed menu style(Unity desktop) to always dock... I honestly tried to get used to that way of working, but could not deal with it and moved to Mint. It drives me crazy the occasional time I have to work on my wife's Macbook. Most of the time, I have an application up filling 1/4 of the screen, but have to move my mouse all the way up to the top left to get to am menu item. I did however change my Mint setup to have the window icons on the left as Mac does and I miss this when I am at work on a Windows machine.