Personally i stayed on ios 9 most of this year (iphone 6s), in August i updated to ios 10.3.3 finally however i found two serious annoying bugs so, the decision is pretty simple for me today i'm updating all my devices to ios 11.1
IOS 10 was never THAT great anyways imo.
I agree that 10 wasn't much of an improvement over 9. I will also say that I don't think any of my devices did as well for battery life on 10 as they did on 9. 11 has been really great on my iPhone 7. As I said, neither my Mini 4 nor my Air 2 did well with 11.0 or 0.1.
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11.1’s speed reminds me of 10.3.3. I had laggy scrolling on 11.0-11.0.3 on my iPhone 8+. It made my 6s+ noticeably slower as well, but I traded that to get my 8+. That said, battery life was always really great on 11.0. Maybe there will be an improvement on 11.1? I’m happy with iOS 11, definitely now with 11.1.
I need to see some more consensus on 11.1 before I irrevocably leave 10.3.3 on my Air 2. My two A8 devices are even bigger question marks.
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Remember there is no going back. I hope it doesn't drive you nuts! It's keeping me on 10.3.3 with my 7.
I had to update my iPhone 7 to take advantage of wOS 4. It's been great. There is the double-tap thing with the home button. That took me a week to get used to, but to me it's not a problem, and I have corporate email on my phone so it's ALWAYS locked unless it's being used.