Even 2% I would not call "virtually no one". 232 million iPhones were sold in 2022, 2% of that is still 4 million iPhones.
However looking at another survey of specifically iPhone users I see as high as 36%.
Going further, of those that upgrade every year how many of those are getting the highest pro models?
Or are subscribed to Apple iPhone Upgrade Program. Even if they are a lower portion of the population they are a consistent and important part of the population.