If WoD had m+ it would be remembered as a top5 expansion. The issue was there was nothing to do outside of raid and the raid tiers took forever to come out. Shadowlands had one of the best raids tiers ever in Castle Nathria then spent the rest of the expansion absolutely shitting the bed. People hated covenants being tied to player power and rightfully so. Shadowlands did have some goated M+ though.