He knows his audience which is why he might not respond, honestly. His fans don't care. He's been exposed on so much shyt (fake abs, ghostwriting, being a weirdo to women, etc) and it has no real impact on his career. Not to mention getting carpet bombed in a rap battle by Pusha had zero impact on him. While I think Kendrick is a very different challenge than Pusha, he may ultimately make the same decision not to respond. I don't mean "very different" as more formidable as a rapper. I'm talking about popularity, social media credit, and commercial talent. If someone has been sniping at you for a decade they probably have a plan of what they want to do to you. Flip side sure, Drake has probably had a decade to think about how he'd respond but he's still the inferior rapper in this battle. The worse rapper can win a battle obviously but this shyt might have too much uncertainty for Drake. With Pusha, I genuinely think that Drake assumed he was simply so popular he could drop anything and win.