I would hate to have to remember even the last octet of all my machines in my house. Instead it's just the simple names. The numbers underneath can all change whenever, it doesn't matter. Until I start calling my kids by an octet a name will be easier to remember instead of "is that north camera 101 or 105 or 113 or..." versus "north-camera.my.net" or "is my pool controller 10.7 or 10.8 or..." Instead it's just pool-pump.my.net.