Particularly on mobile, Facebook is seeing fairly big wins with IPv6.  It&#x27;s not entirely clear why, but it&#x27;s happening. Here&#x27;s Paul Saab&#x27;s deck from earlier this year:  <a href="https:&#x2F;&#x2F;www.dropbox.com&#x2F;s&#x2F;15xi92296lw32hu&#x2F;Facebook-World-IPv6-2015.pdf?dl=0" rel="nofollow">https:&#x2F;&#x2F;www.dropbox.com&#x2F;s&#x2F;15xi92296lw32hu&#x2F;Facebook-World-IPv...</a>