EXOs numbers also quite impressive!
But yeah there is some cut off point when selling 1mil+ become the new norm for the top groups, old groups that managed to transition into that era can now boost there numbers greatly, like the ones you mentioned but also groups that are late bloomers like G-Idle. What I mean to say: the majority of those really high sales numbers come form the last 2 years in most cases.
Haha I tought the same about kep1er, if you compare it to past groups they are like super stars
I also think Treasure did quite well for YG standards, so I'm even more surprised how little care they get.. also YG in general seems to be lacking behind a lot, their questionable business tactics (I mean not giving their groups comebacks), reflect really poorly sales wise. Even BP despite all their glory, will be surpassed by new groups like IVE and NewJeans when they come back next time respectively.