Usually there is always this lateness to Kpop when it comes to music trends. For example among recent songs Stayc's Teddy Bear, Ive's I am are reminiscent of early 2010s trends, YG songs always sound like 3-4 years old while JYP/SM are trying to predict the future that is never gonna happen.
And then comes Le Sserafim. their songs are very modern day when we compare to the west. They fit perfectly. That's not necesseraly always a good thing, since it is hard to predict how well it will age but it is what it is, we just have to wait and see.