Two years after Kendrick Lamar’s defining diss track, Drake’s Iceman arrives in a rap world permanently altered by the song’s aftershocks Kendrick Lamar ’s “Not Like Us” dropped two years ago this week. At the time, Joe Biden was still president, “Brat Summer” had yet to enter the zeitgeist, and “AI slop” had not yet become the default texture of being online. Even so, the song’s impact lives on, able to recalibrate the architecture of the entire rap world. Even if you don’t count Drake ’s now-dismissed lawsuit against Universal Music Group — in which his lawyers argued that the label knowingly published and promoted “Not Like Us” despite allegedly knowing its accusations were false and defamatory, a claim that he is currently trying to revive — the song’s afterlife has been unusually protracted. Most people can concede that, in the court of public opinion, Drake lost the battle , but there hasn’t yet been any sort of closing treatise from either of the two.…