Doesn't this imply that parents are the one purchasing it for them? Would be interesting to see how many stick with iPhone when they start earning for themselves.
Probably most. And not even primarily because of inertia: for the average person, even the technically inclined person, there's really not much of a reason at all to move away from an iPhone. It just works, it almost always just works, it has the best build quality and fit/finish/polish, it's supported for many years, and you always know you're basically getting the best hardware.
And it's not Google.