For eons, the developers of World of Warcraft have allowed players to dive head first into the upcoming content via a Public Test Realm, but it seems that the upcoming Dragonflight update will not be following suit with the PTR.
Pre-release access for updates in World of Warcraft were like peanut butter and jelly; they just went together and stayed together. It appears that this time around the devs have decided not to allow any access to players prior to the next update’s release, as the 10.2.6 patch will not have a PTR for “a portion of the content.” “The WoW team prides itself on ensuring a solid, quality launch. We are sensitive and reactive to problems and issues that can and might arise, so I hope you can forgive us if we experience some hiccups with this experiment and work alongside us as we try this out in March.