David Smith has some data from how his apps are used on Apple Watch:
I’ve been watching the Apple Watch adoption curve within my apps (specifically Pedometer++ for this analysis) quite carefully. My personal hope is that this summer when we get watchOS 5 it will drop support for the Series 0 and free Apple to really push forward on what is possible for developers. But in order for that wish to be realistic I imagine Apple will need the daily use of those first watches to have died down significantly….
So far the data is looking promising that this dream of mine might actually be possible. The Series 3 is being adopted incredibly quickly and just last week became the most popular Apple Watch overall amongst my users with 33% of the overall user-base. The Series 0 is steadily falling, currently at around 24%.
My wife has a stainless steel Series 0, and it still works pretty well (though it’s slow to kick off a workout). I wonder if this fall she’ll be getting a new one…