Moreso diluted, so you never have a distinct r&b sound nor actual growth because that crossover is much more desired by the producers and singers. For example Usher's OMG, great song and to some degree r&b based on the artist makeup but it's still very much a pop song. Also the energy put by record companies for pop artist is ridiculous, I dont know one Jason Derulo song but his a solid pop artist to the point his name spelling was auto-corrected by my phone. This phone (1yr) barely accepts the correct spelling of my name.