In 2022, the following acts made more than 1 million first week sales
BTS, TXT, Enhypen, Seventeen, aespa, Lim Youngwoong, NCT Dream
BlackPink, possibly IVE and some others might make it to this illustrious list.
A girl group and a trottist making it into here means a tectonic change since even they can mobilize dedicated fandom who will push them over 1m first week sales at will.
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The companies are no longer going for a home run.
It might be more beneficial to aim to have enough fans to have arena tours (around 10,000-25,000) around the world, for the companies.
No more national hits. Look at Ikon, who had a mega hit, Love Scenario. They don't make too much money. YG is aware of this and is moving Treasure toward fandom-only act. Even they have abandoned the Big Bang approach.
Before this new model, Korean digitals were considered to be quite important. So having a national hit was more important back then. But this year hardly anyone cares what is the #1 song of the year (most likely Gidle's Tomboy, although Ive's Love Dive will have a strong claim), while everyone cares who sells how many albums.
What happened is that in the past a lot of acts derived their income from K-O-R-E-A-N events and local stuff.
However, the arrival of the trottists basically ended such possibilities.
Trottists basically got to dominate Korea's event market, killing any possibilities for acts which are weaker on physical sales and stronger on digitals, producing music good for the ear.
In a sense, the trottists appear to be a huge blessing in disguise in retrospect, since they ended the model of the digitally stronger acts and forced KPop groups to aim for foreign activities right from the start, eliminating the possibility of poorly constructed acts aiming for a quick buck in K-O-R-E-A (I can't think of a current act which does that recently.)
In turn, as companies shun away from national hits and emphasize albums which will sell, any influence Melon has had over the past years will disappear, and while some people will still watch the Melon charts, they will go into history , its death probably unmourned.