One can argue that there is some temporary remaining vulnerability for Hezbollah members who either didn’t hear about the first attack or had some insanely urgent need to communicate (and this vulnerability wouldn’t exist once they secure the supply chain). But I think the much simpler story is that these attacks aren’t possible only once; supply chain security is a continuum, and people will continue to balance risk of repeat attacks against the costs of security.

Separating them definitely increased the chances that somebody would check their radios - but taking out the pagers drove people to the radios. Now taking out the radios is making people worry what else might be compromised. Your enemy refusing to use their communication equipment is a definite win.

The pagers and radios were supposedly due to the worry that the phone system was compromised - but I'm guessing more people will be using it tomorrow.