Why are Korean dramas so popular?

Recently, Korean dramas are popular. In the past, when the Korean drama Winter Sonata started, the main viewers were housewives, but recently, not only housewives but also middle and high school students are involved in the boom. Why are Korean dramas so popular?

Why Korean dramas are popular again?

When Korean dramas were played before, the reason was the dramaticness and extraordinary feeling of Korean dramas, but now it seems a little different.

Excellent acting ability even if an artist is appointed

Recent Korean dramas are literally dramatic and somewhat unrealistic, but they don’t seem to be the only ones. It seems that popular artists are appointed to attract young people. Korean artists are more trained than Japanese artists. Isn’t that the reason why it doesn’t become obsolete even if an artist is appointed to a drama?