[amigatec]

These are all protocols, these are part of a bigger product.

Look at the overall product. Apple has discontinued use of Firewire now.

[OneWingedShark]

These are all protocols

No, not really; yes, there's a protocol component to USB, FireWire, SCSI, and IDE — but there's also real technical superiority/inferiority because they're more than just protocol, they're also HW-architectures for data-transmission.