Also can't use CIWS near troops and fpvs.
P1-SUN and equivalent are the answer there.
Again, great on a ship.
The Army did a bunch of different testing on this recently.
CIWS is just best for a different threat model.
We're moving into the "waves of drones with orchestration" phase and expensive directional systems won't survive that, and cost on the drone swarms is still drastically lower. Won't matter if you added ten ciws and ten fire-finding radars.
For @YurgenJurgensen above:
You're thinking on a ship, which is great, but these need to be able to provide front line coverage where I becomes an expensive target for cheap munitions. It is not a great solution. It's a fine layer against other threat classes.
Terrain clutter quickly becomes a problem on the battlefield.
Great on ships or for a base defense layer.