The way modern attacks work is you fire your long-range missile first. You coordinate with closer allies like Hezbollah to fire a saturation assault of lesser drones and missiles, so they all arrive at the same time. I haven’t followed it closely but apparently Hezbollah wasn’t involved. Either they said they’d sit this one out or Iran wanted to act alone to shield their proxies from retaliation.
The Iron Dome missiles are used against everything that appears to be headed for a vital target.
BTW, I’ve seen photos of an alleged Ukrainian version of the Iranian drone, and it has a small jet engine.
I studied the drone interception problem extensively after I retired and got with my old company, and they financed a trip to visit a startup that had the technology we needed to defeat drone swarms. Turns out the startup was funded by CCP princelings, so I had to drop it. But here’s the short part. It’s very, very hard to intercept a swarm attack with any of the current technology. The Iron Dome missiles work great, but they are pricey.
A drone swarm requires a counter drone storm.
The defense items that don’t intercept should be recoverable and relaunchable.
Something like the ducted fan RC jets would be the right cost.
The big question is what is the means to take down the enemy craft?