The long run inside of the top 10 is because of the chart reform
Except by Life Boes On every song in the top 10 has at least 15 weeks on top 10
Nowadays is much harder to get into top 10, hence the few songs that are sucessful enough to make into top 10 will stay there for a looong time
However we can't deny koreans loved the song, it could have make into top 10 then drop fast right after the release, but after a very lukewarm 24 hours ULs the song kept growing for about 3 weeks