Since the purchase on 28.09.2017 the hardware has not yet made any problems. Should that change, I document it here.
My iPhone I usually turn off never, but use it always discreet (am not a "Smartphone Zombie") ...
Before going to bed, I usually switch my iPhone to flight mode, which consumes 0-2% energy within 8 hours.
The operating system on my iPhone 8 runs completely trouble-free (with iOS 11).
Here I write down all reboots with justification, to give you an idea of the reliability.
28.09.2017: First time setting and software update
21:20: For the first time turned on. 21:22 it puts the statistics: Settings / Mobile Network.
22:24: Restart after updating to iOS 11.0.1, System Build 15A403, kernel Darwin 17.0.0.
04.10.2017: Software update
01:47: Restart after updating to iOS 11.0.2, System Build 15A421.
14.10.2017: Software update
00:38: Restart after updating to iOS 11.0.3, System Build 15A432.
02.11.2017: Software update
23:54: Restart after updating to iOS 11.1, System Build 15B93.
09.11.2017: Software update
22:38: Restart after updating to iOS 11.1.1, System Build 15B150.
19.11.2017: Software update
20:02: Restart after updating to iOS 11.1.2, System Build 15B202.
Next page: Informations about Firmware and Operating System Apple iOS ...