Was pleased to see it emerge from WWDC that iOS 15 will support all the same phones that iOS 14 did(external link) – including the OG iPhone SE and 6S from 2016. I no longer have my SE, but I did give it to my sister as a hand-me-down when I upgraded, and I think it’s so good that a phone I got 3½ years' mileage out of will continue to be supported for her with years of software updates. The commitment to long-term support – particularly in the form of security updates – was a major reason why I switched from Android to iPhones in the first place, and it’s gratifying to see Apple’s commitment continue 🙂