Kendrick Lamar’s “TV Off” replaces “Luther” at No. 1 on Billboard’s Mainstream R&B/Hip-Hop Airplay chart, marking his eighth leader on the tally.

As its title implies, I Am Music is an argument for his status as an era-defining talent and a wholly unique pop star If Playboi Carti has mostly escaped the kind of “mumble rap” epithets that old ...