Drone warfare as we see in Ukraine is new default. Any poor schmuck ragtag group can muster hundreds of them, with basic grenades or 30/40mm AP grenades. Enough power to kill anything on wheels or tracks apart from modern main battle tank, that one would be just more or less crippled. Bigger drones can and do kill everything, some drop literal 152/155mm shells.

You may say - but we have good EW! Which is pointless for optic cable drones, can't affect them like that. Those are a bit more expensive and sophisticated but not that much.

If US decided to do their invasion to Iraq or Afghanistan these days things would be very different re US casualties and expensive material loss.