I am curious, would an app, say a music player written for iOS in 2015, be usable in 2025? For Android, I can say that it would have to be re-written ~30% or s

I am curious, would an app, say a music player written for iOS in 2015, be usable in 2025? For Android, I can say that it would have to be re-written ~30% or so. The entire permission model has evolved - iOS style runtime permissions - permission to access local files - permission to display notification - special "Foreground service" to run the app in the background ... All of these emerged in the last 10 years.