> How long did it take to find Bin Laden?
Bin Laden used couriers in place of digital communications. And the trail that led to him began with his most trusted courier.
Allegedly, al-Kuwayti was uncovered, some of his communications were intercepted, and then he was followed up to Bin Laden's refuge.
> Who would download some random chat app that nobody uses?
The only thing that slowed the capture was using a courier network. Are you a criminal? Do not use a phone.
Seriously, criminals should know better, whether they are petty drug dealers or major terrorists.
Misplaced faith in cryptography is the gift that keeps on giving.