Re: The reasons for the iPhone sales slump were threefold
one of the reasons, i believe that they were considered a premium device, was the level of integration with the rest of their products - apple tv, mac, watch, photos - the whole thing just worked and worked easily. at upgrade time people were prepared to buy a bit more for ease.
trouble is the USP is being reduced and it's relatively easy to switch.
- google photos allows me out of icloud easily (and is much less intrusive)
- chromecast / firestick / native TV applications let me view photos on my tv
- Spotify has negated my need for itunes
when users start moving out of the eco system, the reason to pay a premium reduces and when that premium gap is so much more, the propensity to buy decreases.
sure people will always buy a premium brand as a status symbol - tag heur watch vs timex for example, but you become more and more niche.
I've just moved out of the apple ecosystem after 8 years, can't see a reason to go back