"If a war starts, Hezbollah may use a low-level drone attack rather than the barrage of 1960s-era artillery rockets that Israel is expecting."

It will be a mix. That's a tactic we've seen proliferating out of Ukraine--a mix of projectiles varying by size and speed to throw off AMD systems. Sometimes it works, sometimes it doesn't (the volley the US/UK/Jordan/Israel shot down heading toward Israel was a mixed volley of drones and varying size/speed rockets for example). That said, the principles of sensor saturation/battery depletion remain the same: if you can fire off more projectiles than the AMD systems can track and/or counter-fire against, then enough projos get through to reek havok on their intended targets. LH/Iran could do swarms of cheaper drones to deplete the counter-battery silos of counter-fire rockets and *then* fire off the Iranian-made rockets after that so that the AMD batteries have nothing left to shoot the 2nd volley of rockets down with. The trick is to ensure that the 2nd volley goes into the air prior to the reload rate on those depleted AMD batteries. LH likely has been probing this factor to estimate the timing of their future mixed rocket/drone volleys in addition to studying the AMD counter-fire envelopes based on altitude and speed of incoming projectile.