That's what people said when the very first iMac replaced ADB and Mini-DIN8 with USB ports. This isn't even exactly replacing the USB standard, just the connect

That's what people said when the very first iMac replaced ADB and Mini-DIN8 with USB ports. This isn't even exactly replacing the USB standard, just the connector type. USB1/2/3 devices will still work, you just need a Type-A to Type-C adapter; much simpler than, say, Thunderbolt to FireWire. The best outcome will be a "rip off the Band-Aid" approach with everyone else adopting USB Type-C (or Thunderbolt 3) as quickly as possible.