IFV are not dead, rocket launchers as well. Even tanks are still a key. At the end people are capturing land/city, not drones.
But drones are changing warfare. Drone hunting other drones, drone with self guidance - they are being used in battle right now.
500$ or even less is the cost of FPV drone with night camera capable to carry 2kg bomb. Russia is buying soldiers for up to $25000 to be killed by such cheap drone later.