I know this is an old thread, but I wish my Macbook had a hard switch to disable WiFi. A doc I had stored in the cloud got corrupted and I was worried the Mac would sync with the corrupted version before I had a chance to switch off the WiFi and save the good copy on the Mac. A hardware switch would have allowed me to do that even before fully booting. It's arrogant to assume that because Apple didn't design a certain feature in, nobody should ever need it. If that was the case Apples would never evolve or improve.