You all speaking about national hits like you are Korean...
I think the word national hit is used WAY too easily for songs that outside of chart performance have nothing.
Imo, they are only a handful of songs that i'd be ready to call a national hit, which is that i assume everyone in korea knows and it would be Love Scenario, Cheer Up, D4, Dynamite and possibly Red Flavor.
These are the most mentionned songs, still used in media and shows etc, they are other songs that could possibly be national hits like TT or Spring Day but since im not korean, i can't really say wether these are national hits or not.
perception is subjective, but stats dont
We are talking based on stats, not 'we think'