Also, considering probably the vast majority of servicing of iPhones happens at an Apple genius bar
That may not be the case for display replacements. From what I've seen, the Geniuses won't attempt to replace a screen if the phone's chassis is even slightly deformed. But the local fixit shops will.
The question then becomes, "How random is the subset of people who get thrown out of the Genius Bar for screwing up their phone really badly?" The wealthiest of those will just buy a new phone, so that's one potential source of bias, I suppose.
That may not be the case for display replacements. From what I've seen, the Geniuses won't attempt to replace a screen if the phone's chassis is even slightly deformed. But the local fixit shops will.
The question then becomes, "How random is the subset of people who get thrown out of the Genius Bar for screwing up their phone really badly?" The wealthiest of those will just buy a new phone, so that's one potential source of bias, I suppose.
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