I've been on the iOS 12 beta for a few days and the gold master (final release) will be released today I believe. I know a lot of folks keep their iStuff on older software. iOS 11 was certainly a bit of a bloated pig for us with older hardware (I own an iPhone 6S Plus and an iPad mini 4 that is purely for flying). Apple really focused on breathing new life into to older hardware (all the way back to the iPhone 5S) with iOS 12 and they publicly stated in their latest iPhone reveal that they want to support their older phones in an attempt to reduce the amount of resources/mining they are using on new phones (who knows how truthful this is - but I thought it was good news for those of us who don't buy new hardware every 2 years). This was no joke - iOS 12 has made a huge difference on my iPhone 6S Plus - it is basically a new phone. Anyways, long story short, iOS 12 is amazing. I'm amazed how snappy the software is now. I updated my iPad mini 4 last night as it was definitely not as quick as it was when I first got it. It wasn't bad, but it definitely could have some new life breathed into it. Again, it made a big difference. Word of caution - I haven't spent nearly as much time on the iPad mini 4 since I updated it as I have my iPhone 6S Plus. I am going to play with the iPad mini 4 this week and do a few flights with it to see how it performs. So...if your one of those folks who hasn't updated their software to escape the inevitable bloat and "slowness" of the new software, you might seriously consider trying iOS 12. I did a full backup and then did a complete restore so that I could load iOS 12 onto a clean slate. I typically do this when a new version of iOS comes out and it has always served me well. iOS 12 may (or may not) be exactly what a lot of us were looking for with older hardware. Cheers.