When Laboum defeated the person on the left of this post, there was an outrage which lasted for a long time and Laboum, which didn't have too much to begin with, never really regained its power following the Yulhee fiasco and its brief revival following the Brave Girls craze didn't really lead to anywhere and it disbanded in Aug 2022 without too much fanfare.
However, when CSR , which is a nugu, I have to say, won #1 in Music Bank (no one bothered to count its rank in the other 2 shows) against Younha, the outrage was not too great. In fact some people congratulated CSR.
That might be because CSR, unlike Laboum , is an unknown, and because of the FIFA World Cup not too many acts were making comebacks Also CSR , since it is so unknown, did not build a history so people did not even know who to pound on.
But also it became an event to show the meaninglessness of the music show wins; now people follow album sales and youtube views as the standard for an act's success , and music show wins which are dictated heavily by the whim of the broadcasters have lost a lot of their luster.
In fact it might have helped csr a bit; it is basically the only 4th gen girl group which does songs done by acts like Lovelyz and GFriend (with some hint of earlier Twice), and people who liked songs from these groups , who now have no one to stan for, might find CSR appealing.
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With the proliferation of newer style of media, music shows are increasingly shunned by the more major acts, who find it simply a waste of time. it does not pay well and it takes a day, or more since some perfs are pre recorded, to show up in a music show Few overseas fans watch the whole show; anyways ; they only see clips of their fave and that's about it.
I think that within a couple of years, music shows will go the way of the dodo. It had its uses, but I think it has outlived its usefulness and will have to go.