I think this article underestimates the power of brand loyalty. Tons of customers have almost a decade of iOS under their belt, and convincing them to learn something new is often impossible because they don't care. Their iPhone is working for them. Tech people think they can list off android-only features and convince people, but it usually doesn't work that way. Only when/if their iPhone really lets them down will they look elsewhere. I say this as someone in that situation. I'm not super interested in my phone, and the iPhone works for me, so here I am.