World of Warcraft has a lot of tier sets.
Tier sets have only recently returned to World of Warcraft: after nearly two expansions without tier gear, tier sets returned in patch 9.2 in the Sepulcher of the First Ones raid.
The last time World of Warcraft had tier sets, they dropped in Antorus, at the end of Legion.
Recently we learned that tier sets will not have tier bonuses in Battle for Azeroth, and they won't really exist as we've known them for the past 13 years.
I love getting new tier sets.