This happens to me quite frequently. That said, there has never been 72 hours where my iPhone has been inactive, unless I’m misunderstanding this feature.???
It’s a reboot. It’s even called “Inactivity Reboot.” Another article:
Understanding the security impacts of iOS 18’s inactivity reboot - Magnet Forensics
Learn about iOS 18's inactivity reboot feature, its security impact, and implications for forensic investigations.www.magnetforensics.com
From the SimplyMac page I linked to earlier:
While I agree with your comment in principle, and do most if not all of what you suggest the issue is most for my less computer proficient friends and relatives. For example a 92 yr old relative click on a site claim to be about college football but was a malware scam page that claimed his computer was infected and he need to pay $$$ to have them clean it. Which when he granted access they installed spyware. This falls into the category you already said, but the point is, at least in my circle, many are computer phobic and think people are trying to help. Lastly as you mention the very sophisticated scams are generally targeting specific people, however, the low level scams as what happened to my 92 year-old relative occurs fairly frequently, 3-4 times per year with a group size of about 70 people.
You can also create a shortcut to restart the device. I’ve added one to my Control Center.
