I set mine to manual. It updated in the middle of the night once and my alarm didn't go off and made me a few hours late to work. Could have totally fucked me over if my boss wasn't cool about it.
I have a MacBook for work and I'm not sure it has ever updated overnight like it said it was gonna. It's quite annoying because OS X updates (or my work's custom stuff? Idk) are so, so bad. Big, focus grabbing prompts popping up to say I need to update, when I agree to do it, it has to download too (every other system I use just downloads automatically and only prompts about the restart), and it is the slowest OS update to boot!
Same. For me it's that the operating system seems afraid to close applications. "I can't reboot because you haven't accepted the xcode TOS, and I don't know how to just close the program".
Coming from a Linux background, I expect my OS to be comfortable giving programs a few seconds warning, and then brutally killing anything that's still running.
Windows does this as well. Every day I have to clear away a notification saying that it's going to update during inactive hours and every day it doesn't. At this point I don't think it's able to update, even manually.
Custom ROM gang: puts off updates for three months because you can't be bothered to actually download the package and re-flash it manually, and it might also screw up your user data and require a reinstall
Granted, this used to be a way bigger problem in the Kitkat/Lollipop days, when CyanogenMod hadn't become Lineage yet. Nowadays OTA updates work pretty well, but occasionally it'll still tell you to flash it manually.
The annoying thing to me is my watch. I wear my watch to sleep because I like to track my sleep and I like waking up to the vibration as opposed to noise. I have auto update on for my watch but it only will do it in the middle of the night while on the charger. I can’t tell it to do it mid-morning instead. So I always have to remember to manual update after putting it on the charger in the morning.
I love it when you can't synchronize in some app by pressing a button, but instead it tells you it's gonna do it at some time in the night probably or whatever don't worry about it. Next morning? Still not synchronized.
I think it often does this when you have an alarm set. It doesn’t want to update, then break and have you sleep through whatever time you set to wake up