After three years, my previous generation AirPort Extreme suddenly stopped working and started making a high pitched sound. Based on what I've read online, it's pretty dead. I have a current gen AirPort Express holding me over for now, but I was wondering if there's any chance of a refresh at WWDC. I can wait two weeks if need be. Is there anything feasible that Apple could add to the Extreme, or is it still pretty modern tech-wise, despite being three years old?