Harry Styles entered Seoul and members of BTS, BlackPink and Twice went to see him.
It is like MacArthur's entry to Tokyo where he basically overpowered the Emperor of Japan, and by corollary everyone in there.
The solo activities of BTS are not going anywhere, and ditto(pun intended) for the solo activities of BlackPink and others, at least in K-O-R-E-A which attracts a a lot of detractors.
The very reason their solo activities are slow in K-O-R-E-A is that whether you like or not, every soloist in K-O-R-E-A, sooner or later, hast to reckon with the singer who had traveled to Japan with Lee Jongsuk.
Taylor Swift, who had a short fling with Styles (and met him for the first time in 11 years in the last Grammys) , is an American while Styles is English, so she does not block Styles' way.
IU can block the way of any soloist you can name and she did it in a very regular basis for the last 13 years.
As long as she is around every solo activity of anyone, including members from major acts, is compared. So her very presence belittles the effort of every soloist in there.
In most other pop industries, someone who had contributed this little to the advancement of its own pop industry and still acts as if she lives in 1990 would be shunned, but in K-O-R-E-A she continues to be revered even though she has not released any songs since end of 2021.
Whyknock thinks that as long as Lee Jieun stands there like a giant mountain blocking everyone else's success, there won't be any major soloist from K-O-R-E-A, from a group or not, which will dominate the world.