Well guys, it happened. My 2015 model 12" Macbook died. My wife and I went on vacation and were watching a movie on the plane. Towards the end of the movie, it started to freeze and stutter which I thought was weird but I figured I'd just reboot afterwards. We made it through the movie and it froze up hard during the credits. I powered it down and it would not reboot after that. It loads to the Mac logo with the progress bar and freezes there. It won't boot to recovery mode, internet recovery mode, safe mode. Nothing. I've tried every boot option under the sun. Nothing. I suspected hardware, but oddly enough in single-user mode I could nativate the drive and see my files so I wasn't sure...but the fact I couldn't even get to internet recovery mode told me it probably had to be hardware. Brought it in today and they are running disagnostics on it. It won't even boot off an external drive so they suspect hardware at this point as well. Once the diagnostic finishes overnight we'll hopefully know more. Covered by AppleCare+ through July 2018 fortunately. So hopefully it won't cost me anything...but I sure miss my Macbook!