Lupe Fiasco's dense rap style was taken up readily by new generations. It's easy to hear his cadences in fellow West Side rapper Saba on jazzy neighborhood anthem "Westside Bound 3." Vince Staples' conscientious, grinding "Lift Me Up" shows a debt to Lupe's purposeful politics. And Kendrick Lamar's "Backseat Freestyle" demonstrates the long footprint of his freewheeling, concept-driven lyric stylings.