I was under the impression that, if there's been any identifiable trend in recent K-pop, it's been in the direction of increasing the electrobeats, with minitrends towards crypto-freestyle and blatant disco, these at the expense of a more R&B sound. But there are probably nearly as many counterexamples as examples, and Lee Hi's soul-r&b "1,2,3,4" was number one for three weeks last month. An even bigger "but," when it comes to trends and directions, is that I just ran across H.O.T.'s "We Are The Future" from way back in 1997, and it feels a lot like electro and freestyle too, though of course with the requisite K-pop rapping. And it's good.
H.O.T. were boyband superstars, probably the band that put SM Entertainment on the map.*
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What reminds me of freestyle are the dolorous melodies (sounding a bit like the Mideast), the intertwining instrumental hooks, and the electro-rhythms. Freestyle's heyday in the U.S was the mid and late '80s (Cynthia's great "
Change On Me," for example), but Korea has been making hay with it since, though not diving as deep and deliriously into hooks and beats as the original New York-Miami version had.
*You who know K-pop history better than I do should correct me if I'm wrong.