I’m not sure it was because they cared about security - looks more like accounting for 32-bit timestamp rollover would be very disruptive to the huge (legacy) code base and it was a quick fix to work around the problem :)
I'm pretty sure you're joking. Windows 95 crashed if you sneezed in its general direction, I'm pretty sure it would blue screen due to some edge case well before 49 days of runtime.
To this day, some programs malfunction after 2^31 milliseconds have passed since bootup, which is the halfway point. Milliseconds since bootup has just become negative, and has not rolled over yet. Just having a negative number of milliseconds is enough to mess with those programs.
As the article alludes to, Apple recently shipped the same policy to iOS so this is likely just following the precedent from them. Android developers don't pay attention to community forks.
Graphene's autoreboot has 12 different options (excluding disabling it) ranging from 72 hours down to 10 minutes and the timer is reset each time the device is unlocked. Tbh I think a 1 minute setting would actually be nice (for things like when you are going through customs, etc) but I get why they don't provide it.
The system only reboots once it has been locked for a particular duration. Setting it to 1 minute basically says: put the system into a more secure state (e.g. purge unencrypted memory) and ensure that it is ready to go when I next need it. That said, while it is not unrealistic it would be problematic since accidentally letting the phone lock (e.g. input timeout) would result in a time consuming reboot.
