In my opinion, modern music "sucks" because it hasn't changed much from what became popular in the late 1990s ... Popular music of the 1950s sounded different from popular music of the 1960s, which sounded different from popular music of the 1970s, which sounded different from popular music of the 1980s, which sounded different from popular music of the 1990s, and then popular music (more or less) stagnated.