Well, hard drives are going their own way with modernization. The expensive whizzy drives run Fibre Channel (which you can use to build freaking huge storage-attached-networks), and now they're even talking about iSCSI (that would be the SCSI protocol over IP, I think).

You see, the idea of a legacy-free machine is nifty and all, but then we've all got these legacy devices around. Such as the Empeg with it's serial port that you're required to use for kernel upgrades. Or maybe that old parallel-port based printer you've still got. Of course, you're welcome to buy USB-to-whatever converters, but nonetheless, it's nice to have legacy ports around.