Earlier quoted context omitted.
Imagine your annual income is $200k, and you expect your iPhone X to last 2 years. Imagine you're very busy with work and parenting, and it's very valuable to you to be able to take high quality pictures of your baby and share them with family and friends. A smartphone is the most convenient way to do that. A smartphone that costs ~$1000 takes much better pictures, and faster shutter response, than a smartphone that…
What's the marginal utility over a 500$ Galaxy S8?
At least that was my experience switching my primary mobile device from iOS to Android. And I'd have the same amount of inconvenience if I were to switch from Android to iOS.
Some people value their time highly, and don't find it enjoyable to find solutions to technical or usability problems. So switching to/from iOS has significant disutility.