I would say usb killed floppies and serial ports. Built-in modems aren't dead, they are still on a surprisingly number of laptops. He killed OS 9 so he could

I would say usb killed floppies and serial ports. Built-in modems aren't dead, they are still on a surprisingly number of laptops. He killed OS 9 so he could sell OS X. That's like saying Microsoft killed Win95. That's planned obsolescence.