Since no one in the "real world" uses Syquest drives any longer, or plugs a scanner into a laptop, your examples are wasted. But, in the "real world", people with laptops aren't all travelers, don't all work on jets, and don't code. But we do want to plug in flash drives to quickly move data, an external USB drive now and then, plug into an ethernet network, use a wired/wireless mouse and keyboard when working at a desk, or one of any number of adapters for serial connections to manage network equipment, usb cables to charge any number of devices (like my magnetic usb charger for a Plantronics BT headset), connect to an external monitor or audio system, etc. The list goes on. One port? No thank you.