it's over guys, I will miss you all.
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Since the launch of Battle for Azeroth, we’ve noticed an increasing trend of players turning off XP gains at level 110 in order to repeatedly powerlevel other players’ characters at an excessive rate without increasing their own level. The intention of the XP-off feature is to allow alternate characters to stay in lower-level PvP brackets or relive lower-level content, not to purposefully halt progression in content relevant to the current expansion.
To curb this behavior, we plan to implement a hotfix in the coming days that will disable the ability to turn off XP gains on characters level 110 or higher. Additionally, any character of that level who already has XP disabled will find it automatically re-enabled the next time they log in.
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https://us.forums.blizzard.com/en/wow/t/disabling-xp-gains-on-110-characters/53391