Drew_B heres the Gaon yearly gg review placement for Twice 2016-2020 since my opinion is too biased for your liking. So, what's your reasoning for not giving Twice 2016/19?
Is this thread not ment to be by year of release? also, Fancy isn't the only twice album from 2019 and it's not even their best selling in 2019 so why don't you use FS numbers instead?
If we are talking only about in Korea, then yes Twice still dominated in 2019.
But K-POP has been all over the world and Blackpink has dominated Twice globally overall since D4.
2020 was not the start of Blackpink domination but it was when Onces could not deny it anymore as Twice finally lost the last hold of physical sales.