For the first time in 35 years, the Billboard Hot 100 Top 40 features zero rap songs following the exit of #KendrickLamar and #SZA’s song “Luther.” The departure comes after #Billboard implemented a rule change that altered its retention criteria: songs must now hit certain thresholds, such as top 5 within 78 weeks or top 25 within 26 weeks, to remain on the chart. “Luther” dropped off despite finishing at No. 38, because it “failed to reach No. 25 after 26 weeks on the chart.” The absence of ra