It does suck when Apple “obsoletes” your device, especially when you love the shiny new things. But I have a Series 4 Apple Watch that I bought when that was the current device. It still does everything I bought it for and that I use it for. It even retains a feature the SE3 doesn’t doesn’t have. I figure it’s a watch, and I’m going to see if I can get it to last for a decade—unless or until iPhone OS won’t talk to it, or the battery gives out. Whichever comes first.