We have a 1st gen SE running v15.2 and it is working very well (still). For small hands, there is nothing else by Apple that comes close, sadly, and we prefer to stay in the ecosystem but are not religious about that. We were ready to buy the 2nd gen until the size increase was announced so deferred. We’ll likely keep the 1st gen until it absolutely dies. Our iPhone7 likewise keeps chugging along in its form factor which is more easily replaced with things like the iPhone12 mini and subsequent similarly-sized iPhones, but the 1st gen SE is unique today for size. Sad…for us anyway.