We've seen armour designs designed to stop them (reactive armour, and statistical armour [1]). Understanding the exact properties and design of the projectiles you're trying to stop is important for making these, for instance statistical armour is really designed to trick a specific fuse system into not firing.

Armour has not entirely lost the war, and even if some day it does, there's nothing saying that some new innovation won't let it catch back up.

[1] When cages are done right: https://www.tanknology.co.uk/post/statistical-armour