I highly doubt this is as complicated as persistence. 1) even on mobiles you still get the occasional webview or other core library update and need to reboot t

I highly doubt this is as complicated as persistence. 1) even on mobiles you still get the occasional webview or other core library update and need to reboot to complete the patch. 2) modern versions of Android use per-file encryption. Periodically rebooting flushes unencrypted buffers.