This is the most popular WoW spec in Mythic+ dungeons—and it’s not Retri Paladin
Since their rework in Patch 10.0.7, Retribution Paladins have been taking over Dragonflight with their blinding lights and unparalleled DPS. Precisely because of this, you can’t queue up for PvP content or Mythic+ dungeon without seeing at least one Retribution Paladin. But although they are the flavor of the month, they are actually not the most popular spec in Mythic+ dungeons.
According to the latest stats from the Mythic+ stats page, Raider.IO, the spec that sees the most action is Restoration Druid with spec frequency at all levels being 6.1 percent.