A 1 yr old iphone last for quite a good while. About 4-5yrs later I sell it and buy another one. Hardly bifl but it keeps me in a functioning modern phone that just works.

Got no boasts to make about headphones, bought the Airpod Max when they came out. They are still 100% functional and have been brilliant but I doubt they’ll make it 10 years and certainly the battery will need replacing before then. They will become obsolete at some point.