I know it's a little early re iOS 11 (what devices get support?)

[Atomic1977]

I thought everything was 64bit that came out in these last few years.???

 

[Vivian125]

iOS 11(2017-2018)
iPhone 5S or newer
iPod Touch 6th Gen or newer
iPad Mini 2 or newer
iPad Air or newer
iPad 5Th gen or newer

iOS 12(2018-2019)
iPhone 6 or newer (maybe 5S won't get, cuz it's still clocked 1.3Ghz, also no NFC, no volte, not power efficient just like the iPhone 5..both 5 and 5s is 1.3Ghz aanyways)
iPod Touch 6Th Gen or newer
iPad Mini 3 or newer
iPad Air 2 or newer (The air is always been laggy since iOS 7, it's one of the incomplete iDevice example: lacks Touch ID)
iPad 5th Gen or newer


iOS 13(2019-2020)
iPhone 6S or newer (6 did not get cuz of Ram limitation)
iPad Mini 4 or newer ( the mini 3 won't Same as 6, cuz of still 1gb ram)
iPad Air 2 or newer
iPad 5 or newer

iOS 14(2020-2021)
iPhone 7 or newer
iPad Pro 10.5" or newer

iOS 15(2021-2022)
iPhone 8/X or newer

Nothing Last Forever, Just like "Allucard Says" in Mobile Legends.