As we all know the 4gen has started since 2018 ( some might argue that it started a little bit later ) which means it's being 4 years that this generation started but we have yet to see a top boy group and a top girl.
What i mean by that is that this generation doesn't have a group that beats every other groups in all categories like for example during the second generation we had Girls generation who owned the Korean charts, sails that could compete with boy groups sales, and they had the most number one show wins, and for Boy groups we had BigBang who excelled in all categories although their sales weren't huge no one could be them on charts and Korea had chosen them as their representative bg.
For the third Generation for ggs we have Twice and Blackpink who excel in multiple categories beating all other ggs and for boy groups we had Exo and then they passed their crown the BTS who dominated everything.
But it comes to this generation the 4th generation we don't have a clear number one, we have Aespa who recently achieved the highest album sail for a gg but the charts have yet to follow with them it's either a hit or miss when it comes to Korean charting, for their Spotify well they're on pare with other ggs, when it comes to music show wins well they don't beat any other gg.
For I've who made their debut 7 months ago have two songs who made it to number one on the charts a lot a huge number of music show wins which is really impressive for them, good Spotify numbers but their sales although amazing for them they still didn't beat any records.
G-idle and Itzy both debuted at an awkward times not at the beginning of 4gen but also not at the end of 3rd gen so it's pretty weird to compare them to the other girl groups of this generation.
When it comes to G-idle they where the dark horse of these year, manged to have one of the most acclaimed song of the year so far maintaining number one for a very long time which was impressive for group that people thought would fade away after the scandal but they proved everyone wrong, but let's go to their sales although they're good they still lack a lot of group with their popularity, when it comes to their music show wins i can't compare them to other ggs simply because they have a couple year of advance compare to them, they have good number of Spotify listeners but they don't beat anyone.
Itzy had a great start with Dala Dala beating different records but unfortunately those records got beaten by other groups, they still have a good number of sales and Spotify listeners but not enough to crown them number one.
Rookies like Lesserafim, Nmixx and Kepler have being doing well for themselves although Lesserafim beats them in all categories for now.
Boy groups, for these generation boy groups achievement are so weird when have groups like Enhypen who are million salaires with amazing Spotify numbers but fail to chart and their music show wins are small. In general it hard to categories boy groups because the gap between them isn't huge from txt, Stray kids ( these two are like g idle and Itzy) to treasure all these groups have good sails and Spotify numbers yet no one really take number one spot in everything.
To summer this 4gen is generation which has multiple top groups and each one of them excels in one category and each have enough success to sustain them for a long time and that's what makes it special a generation with great achievement that where once hard to obtain.