My phrasing wasn’t great there - I meant that it won’t be due to the change in iOS version, ie it’s not a problem with iOS 17, but instead a temporary problem that happens whenever you do either a fresh install of iOS or a major version update (eg 15 to 16, or 16 to 17).
When you do a major version update, often most or all of the cached learning information iOS has gathered is wiped out and started fresh - the wifi hotspot triangulation data, learned app usage patterns, etc. It’s definitely all wiped out and started fresh if you do a fresh iOS install, but much of it is also started fresh when doing a major version update.
So we can’t really conclude that any of the problems are do with iOS 17 until it’s been at least a week since the upgrade (and sometimes even a couple of weeks - though hopefully not!)
There’s also the fact that I think most Arc users are already on iOS 17. So the weight of probabilities has it that iOS 17 itself probably isn’t the problem.
If you’re still seeing excessive battery use after 1-2 weeks post upgrade (though really one week should be the worst case), then it’ll be time to start debugging deeper. But when the upgrade is relatively fresh, the upgrade itself still stands as the most likely cause of the problems, and that they will be both temporary and self resolving.
Also good to remember: The largest consumer of energy/battery by far is the phone’s screen and the phone’s CPU. And whichever app you have in the foreground is the one that the Settings → Battery view counts that energy consumption towards. So if screen time is high for an app, it’s unavoidable that it will also be one of the highest consumers of energy in the Settings → Battery view. (Tap the app name rows to get the view to show you screen time vs background time for each app).
If the app has high percentage of battery use but also high screen time, then that’s normal. If however the app has low screen time (eg less than 10 minutes) but also high percentage of battery use, that’s something to keep an eye on.
So for example on my main phone Arc is 5th in the list (on the “last 24 hours” view) with 11%, and has 32 minutes of screen time. So that’s actually really good.
The app at the top of the list is Strong - my gym workouts app - with 18% and only 13 minutes of screen time. So that’s pretty bad. But in Strong’s defence, it’s an app that you don’t use repeatedly throughout the day, so it’s not a big concern.