All facts point out that the Snapdragon 835+ (SM-G955) powered US version of the Samsung Galaxy S8+ has just been rooted.
Being such a high-profile and popular handset, one would probably expect avid developers and Android tinkerers to have cracked the system gates of the Snapdragon-powered Galaxy S8+ long ago, but sadly, this was not the case until recently, when XDA user BotsOne announced in the main XDA root thread for the device that root access has been successfully gained, and subsequently, SuperSU has been installed on the device. … – Source