Deep intelligence

The Israeli air raid that killed Nasrallah killed 90 other members of Hezbollah — probably many of them leaders.

It will not be easy to replace them with experienced new commanders.

There must still be hundreds of commanders who can order their units to keep firing missiles. That doesn't require cleverness, great authority, or special cleverness. For Hezbollah to change its course of action will be far more difficult. Especially difficult would be any reduction in the level of conflict. In effect, Hezbollah may now be too weak to be flexible.