At what point in a Mac's / iPhone's life do you feel that the fragmentation of Apple's hardware and services cause a major disruption to owning it? This question was borne out of a previous complaint I saw where the new Lightning Earpods don't work with all Lighting-equipped devices (but iOS 9 locked). Those devices should easily be compatible but are not. Also Apple Music is iOS 8.4 and above. Siri is locked to Sierra-compatible computers, Apple Music to Mavericks and above. What other examples are there? A three-year old device with the correct connector but not software is pretty bad. Imagine if the headphone jack was disabled rather than removed, is that worse? In other words, how many years of perfect synergy of services and hardware can one expect in iOS and macOS before they fragment? So far I'm seeing about 8 years on Mac and 3 on iOS, would that be correct?